diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.check_valid_creds.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.check_valid_creds.js
new file mode 100644
index 00000000000..7894851c6af
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.check_valid_creds.js
@@ -0,0 +1,55 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(name) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_CheckValidCreds_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The data source in the form:
+   *  `projects/{project_id}/dataSources/{data_source_id}` or
+   *  `projects/{project_id}/locations/{location_id}/dataSources/{data_source_id}`.
+   */
+  // const name = 'abc123'
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function checkValidCreds() {
+    // Construct request
+    const request = {
+      name,
+    };
+
+    // Run request
+    const response = await datatransferClient.checkValidCreds(request);
+    console.log(response);
+  }
+
+  checkValidCreds();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_CheckValidCreds_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.create_transfer_config.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.create_transfer_config.js
new file mode 100644
index 00000000000..7876bd4646a
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.create_transfer_config.js
@@ -0,0 +1,95 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(parent, transferConfig) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_CreateTransferConfig_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The BigQuery project id where the transfer configuration should be created.
+   *  Must be in the format projects/{project_id}/locations/{location_id} or
+   *  projects/{project_id}. If specified location and location of the
+   *  destination bigquery dataset do not match - the request will fail.
+   */
+  // const parent = 'abc123'
+  /**
+   *  Required. Data transfer configuration to create.
+   */
+  // const transferConfig = ''
+  /**
+   *  Optional OAuth2 authorization code to use with this transfer configuration.
+   *  This is required if new credentials are needed, as indicated by
+   *  `CheckValidCreds`.
+   *  In order to obtain authorization_code, please make a
+   *  request to
+   *  https://www.gstatic.com/bigquerydatatransfer/oauthz/auth?client_id=<datatransferapiclientid>&scope=<data_source_scopes>&redirect_uri=<redirect_uri>
+   *  * client_id should be OAuth client_id of BigQuery DTS API for the given
+   *    data source returned by ListDataSources method.
+   *  * data_source_scopes are the scopes returned by ListDataSources method.
+   *  * redirect_uri is an optional parameter. If not specified, then
+   *    authorization code is posted to the opener of authorization flow window.
+   *    Otherwise it will be sent to the redirect uri. A special value of
+   *    urn:ietf:wg:oauth:2.0:oob means that authorization code should be
+   *    returned in the title bar of the browser, with the page text prompting
+   *    the user to copy the code and paste it in the application.
+   */
+  // const authorizationCode = 'abc123'
+  /**
+   *  Optional version info. If users want to find a very recent access token,
+   *  that is, immediately after approving access, users have to set the
+   *  version_info claim in the token request. To obtain the version_info, users
+   *  must use the "none+gsession" response type. which be return a
+   *  version_info back in the authorization response which be be put in a JWT
+   *  claim in the token request.
+   */
+  // const versionInfo = 'abc123'
+  /**
+   *  Optional service account name. If this field is set, transfer config will
+   *  be created with this service account credentials. It requires that
+   *  requesting user calling this API has permissions to act as this service
+   *  account.
+   */
+  // const serviceAccountName = 'abc123'
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function createTransferConfig() {
+    // Construct request
+    const request = {
+      parent,
+      transferConfig,
+    };
+
+    // Run request
+    const response = await datatransferClient.createTransferConfig(request);
+    console.log(response);
+  }
+
+  createTransferConfig();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_CreateTransferConfig_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.delete_transfer_config.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.delete_transfer_config.js
new file mode 100644
index 00000000000..12423e70abe
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.delete_transfer_config.js
@@ -0,0 +1,55 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(name) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_DeleteTransferConfig_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The field will contain name of the resource requested, for example:
+   *  `projects/{project_id}/transferConfigs/{config_id}` or
+   *  `projects/{project_id}/locations/{location_id}/transferConfigs/{config_id}`
+   */
+  // const name = 'abc123'
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function deleteTransferConfig() {
+    // Construct request
+    const request = {
+      name,
+    };
+
+    // Run request
+    const response = await datatransferClient.deleteTransferConfig(request);
+    console.log(response);
+  }
+
+  deleteTransferConfig();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_DeleteTransferConfig_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.delete_transfer_run.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.delete_transfer_run.js
new file mode 100644
index 00000000000..4fe9ff0e478
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.delete_transfer_run.js
@@ -0,0 +1,55 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(name) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_DeleteTransferRun_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The field will contain name of the resource requested, for example:
+   *  `projects/{project_id}/transferConfigs/{config_id}/runs/{run_id}` or
+   *  `projects/{project_id}/locations/{location_id}/transferConfigs/{config_id}/runs/{run_id}`
+   */
+  // const name = 'abc123'
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function deleteTransferRun() {
+    // Construct request
+    const request = {
+      name,
+    };
+
+    // Run request
+    const response = await datatransferClient.deleteTransferRun(request);
+    console.log(response);
+  }
+
+  deleteTransferRun();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_DeleteTransferRun_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_data_source.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_data_source.js
new file mode 100644
index 00000000000..014fe51d3f3
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_data_source.js
@@ -0,0 +1,55 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(name) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_GetDataSource_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The field will contain name of the resource requested, for example:
+   *  `projects/{project_id}/dataSources/{data_source_id}` or
+   *  `projects/{project_id}/locations/{location_id}/dataSources/{data_source_id}`
+   */
+  // const name = 'abc123'
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function getDataSource() {
+    // Construct request
+    const request = {
+      name,
+    };
+
+    // Run request
+    const response = await datatransferClient.getDataSource(request);
+    console.log(response);
+  }
+
+  getDataSource();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_GetDataSource_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_transfer_config.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_transfer_config.js
new file mode 100644
index 00000000000..d096f3d7d36
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_transfer_config.js
@@ -0,0 +1,55 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(name) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_GetTransferConfig_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The field will contain name of the resource requested, for example:
+   *  `projects/{project_id}/transferConfigs/{config_id}` or
+   *  `projects/{project_id}/locations/{location_id}/transferConfigs/{config_id}`
+   */
+  // const name = 'abc123'
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function getTransferConfig() {
+    // Construct request
+    const request = {
+      name,
+    };
+
+    // Run request
+    const response = await datatransferClient.getTransferConfig(request);
+    console.log(response);
+  }
+
+  getTransferConfig();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_GetTransferConfig_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_transfer_run.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_transfer_run.js
new file mode 100644
index 00000000000..df72a9d5d48
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.get_transfer_run.js
@@ -0,0 +1,55 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(name) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_GetTransferRun_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The field will contain name of the resource requested, for example:
+   *  `projects/{project_id}/transferConfigs/{config_id}/runs/{run_id}` or
+   *  `projects/{project_id}/locations/{location_id}/transferConfigs/{config_id}/runs/{run_id}`
+   */
+  // const name = 'abc123'
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function getTransferRun() {
+    // Construct request
+    const request = {
+      name,
+    };
+
+    // Run request
+    const response = await datatransferClient.getTransferRun(request);
+    console.log(response);
+  }
+
+  getTransferRun();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_GetTransferRun_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_data_sources.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_data_sources.js
new file mode 100644
index 00000000000..a00e9fbb45b
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_data_sources.js
@@ -0,0 +1,69 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(parent) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_ListDataSources_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The BigQuery project id for which data sources should be returned.
+   *  Must be in the form: `projects/{project_id}` or
+   *  `projects/{project_id}/locations/{location_id}
+   */
+  // const parent = 'abc123'
+  /**
+   *  Pagination token, which can be used to request a specific page
+   *  of `ListDataSourcesRequest` list results. For multiple-page
+   *  results, `ListDataSourcesResponse` outputs
+   *  a `next_page` token, which can be used as the
+   *  `page_token` value to request the next page of list results.
+   */
+  // const pageToken = 'abc123'
+  /**
+   *  Page size. The default page size is the maximum value of 1000 results.
+   */
+  // const pageSize = 1234
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function listDataSources() {
+    // Construct request
+    const request = {
+      parent,
+    };
+
+    // Run request
+    const iterable = await datatransferClient.listDataSourcesAsync(request);
+    for await (const response of iterable) {
+      console.log(response);
+    }
+  }
+
+  listDataSources();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_ListDataSources_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_configs.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_configs.js
new file mode 100644
index 00000000000..e3d2c31053a
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_configs.js
@@ -0,0 +1,73 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(parent) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_ListTransferConfigs_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. The BigQuery project id for which data sources
+   *  should be returned: `projects/{project_id}` or
+   *  `projects/{project_id}/locations/{location_id}`
+   */
+  // const parent = 'abc123'
+  /**
+   *  When specified, only configurations of requested data sources are returned.
+   */
+  // const dataSourceIds = 'abc123'
+  /**
+   *  Pagination token, which can be used to request a specific page
+   *  of `ListTransfersRequest` list results. For multiple-page
+   *  results, `ListTransfersResponse` outputs
+   *  a `next_page` token, which can be used as the
+   *  `page_token` value to request the next page of list results.
+   */
+  // const pageToken = 'abc123'
+  /**
+   *  Page size. The default page size is the maximum value of 1000 results.
+   */
+  // const pageSize = 1234
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function listTransferConfigs() {
+    // Construct request
+    const request = {
+      parent,
+    };
+
+    // Run request
+    const iterable = await datatransferClient.listTransferConfigsAsync(request);
+    for await (const response of iterable) {
+      console.log(response);
+    }
+  }
+
+  listTransferConfigs();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_ListTransferConfigs_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_logs.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_logs.js
new file mode 100644
index 00000000000..0ec5eb757f4
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_logs.js
@@ -0,0 +1,74 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(parent) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_ListTransferLogs_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. Transfer run name in the form:
+   *  `projects/{project_id}/transferConfigs/{config_id}/runs/{run_id}` or
+   *  `projects/{project_id}/locations/{location_id}/transferConfigs/{config_id}/runs/{run_id}`
+   */
+  // const parent = 'abc123'
+  /**
+   *  Pagination token, which can be used to request a specific page
+   *  of `ListTransferLogsRequest` list results. For multiple-page
+   *  results, `ListTransferLogsResponse` outputs
+   *  a `next_page` token, which can be used as the
+   *  `page_token` value to request the next page of list results.
+   */
+  // const pageToken = 'abc123'
+  /**
+   *  Page size. The default page size is the maximum value of 1000 results.
+   */
+  // const pageSize = 1234
+  /**
+   *  Message types to return. If not populated - INFO, WARNING and ERROR
+   *  messages are returned.
+   */
+  // const messageTypes = 1234
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function listTransferLogs() {
+    // Construct request
+    const request = {
+      parent,
+    };
+
+    // Run request
+    const iterable = await datatransferClient.listTransferLogsAsync(request);
+    for await (const response of iterable) {
+      console.log(response);
+    }
+  }
+
+  listTransferLogs();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_ListTransferLogs_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_runs.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_runs.js
new file mode 100644
index 00000000000..5d1dcc13982
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.list_transfer_runs.js
@@ -0,0 +1,78 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(parent) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_ListTransferRuns_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. Name of transfer configuration for which transfer runs should be retrieved.
+   *  Format of transfer configuration resource name is:
+   *  `projects/{project_id}/transferConfigs/{config_id}` or
+   *  `projects/{project_id}/locations/{location_id}/transferConfigs/{config_id}`.
+   */
+  // const parent = 'abc123'
+  /**
+   *  When specified, only transfer runs with requested states are returned.
+   */
+  // const states = 1234
+  /**
+   *  Pagination token, which can be used to request a specific page
+   *  of `ListTransferRunsRequest` list results. For multiple-page
+   *  results, `ListTransferRunsResponse` outputs
+   *  a `next_page` token, which can be used as the
+   *  `page_token` value to request the next page of list results.
+   */
+  // const pageToken = 'abc123'
+  /**
+   *  Page size. The default page size is the maximum value of 1000 results.
+   */
+  // const pageSize = 1234
+  /**
+   *  Indicates how run attempts are to be pulled.
+   */
+  // const runAttempt = ''
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function listTransferRuns() {
+    // Construct request
+    const request = {
+      parent,
+    };
+
+    // Run request
+    const iterable = await datatransferClient.listTransferRunsAsync(request);
+    for await (const response of iterable) {
+      console.log(response);
+    }
+  }
+
+  listTransferRuns();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_ListTransferRuns_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.schedule_transfer_runs.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.schedule_transfer_runs.js
new file mode 100644
index 00000000000..04bd053da78
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.schedule_transfer_runs.js
@@ -0,0 +1,67 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(parent, startTime, endTime) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_ScheduleTransferRuns_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. Transfer configuration name in the form:
+   *  `projects/{project_id}/transferConfigs/{config_id}` or
+   *  `projects/{project_id}/locations/{location_id}/transferConfigs/{config_id}`.
+   */
+  // const parent = 'abc123'
+  /**
+   *  Required. Start time of the range of transfer runs. For example,
+   *  `"2017-05-25T00:00:00+00:00"`.
+   */
+  // const startTime = ''
+  /**
+   *  Required. End time of the range of transfer runs. For example,
+   *  `"2017-05-30T00:00:00+00:00"`.
+   */
+  // const endTime = ''
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function scheduleTransferRuns() {
+    // Construct request
+    const request = {
+      parent,
+      startTime,
+      endTime,
+    };
+
+    // Run request
+    const response = await datatransferClient.scheduleTransferRuns(request);
+    console.log(response);
+  }
+
+  scheduleTransferRuns();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_ScheduleTransferRuns_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.start_manual_transfer_runs.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.start_manual_transfer_runs.js
new file mode 100644
index 00000000000..45b87bc5ea3
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.start_manual_transfer_runs.js
@@ -0,0 +1,62 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main() {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_StartManualTransferRuns_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Transfer configuration name in the form:
+   *  `projects/{project_id}/transferConfigs/{config_id}` or
+   *  `projects/{project_id}/locations/{location_id}/transferConfigs/{config_id}`.
+   */
+  // const parent = 'abc123'
+  /**
+   *  Time range for the transfer runs that should be started.
+   */
+  // const requestedTimeRange = ''
+  /**
+   *  Specific run_time for a transfer run to be started. The
+   *  requested_run_time must not be in the future.
+   */
+  // const requestedRunTime = ''
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function startManualTransferRuns() {
+    // Construct request
+    const request = {};
+
+    // Run request
+    const response = await datatransferClient.startManualTransferRuns(request);
+    console.log(response);
+  }
+
+  startManualTransferRuns();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_StartManualTransferRuns_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.update_transfer_config.js b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.update_transfer_config.js
new file mode 100644
index 00000000000..3defad83838
--- /dev/null
+++ b/packages/google-cloud-bigquery-datatransfer/samples/generated/v1/data_transfer_service.update_transfer_config.js
@@ -0,0 +1,93 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+function main(transferConfig, updateMask) {
+  // [START bigquerydatatransfer_v1_generated_DataTransferService_UpdateTransferConfig_async]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+  /**
+   *  Required. Data transfer configuration to create.
+   */
+  // const transferConfig = ''
+  /**
+   *  Optional OAuth2 authorization code to use with this transfer configuration.
+   *  If it is provided, the transfer configuration will be associated with the
+   *  authorizing user.
+   *  In order to obtain authorization_code, please make a
+   *  request to
+   *  https://www.gstatic.com/bigquerydatatransfer/oauthz/auth?client_id=<datatransferapiclientid>&scope=<data_source_scopes>&redirect_uri=<redirect_uri>
+   *  * client_id should be OAuth client_id of BigQuery DTS API for the given
+   *    data source returned by ListDataSources method.
+   *  * data_source_scopes are the scopes returned by ListDataSources method.
+   *  * redirect_uri is an optional parameter. If not specified, then
+   *    authorization code is posted to the opener of authorization flow window.
+   *    Otherwise it will be sent to the redirect uri. A special value of
+   *    urn:ietf:wg:oauth:2.0:oob means that authorization code should be
+   *    returned in the title bar of the browser, with the page text prompting
+   *    the user to copy the code and paste it in the application.
+   */
+  // const authorizationCode = 'abc123'
+  /**
+   *  Required. Required list of fields to be updated in this request.
+   */
+  // const updateMask = ''
+  /**
+   *  Optional version info. If users want to find a very recent access token,
+   *  that is, immediately after approving access, users have to set the
+   *  version_info claim in the token request. To obtain the version_info, users
+   *  must use the "none+gsession" response type. which be return a
+   *  version_info back in the authorization response which be be put in a JWT
+   *  claim in the token request.
+   */
+  // const versionInfo = 'abc123'
+  /**
+   *  Optional service account name. If this field is set and
+   *  "service_account_name" is set in update_mask, transfer config will be
+   *  updated to use this service account credentials. It requires that
+   *  requesting user calling this API has permissions to act as this service
+   *  account.
+   */
+  // const serviceAccountName = 'abc123'
+
+  // Imports the Datatransfer library
+  const {DataTransferServiceClient} =
+    require('@google-cloud/bigquery-data-transfer').v1;
+
+  // Instantiates a client
+  const datatransferClient = new DataTransferServiceClient();
+
+  async function updateTransferConfig() {
+    // Construct request
+    const request = {
+      transferConfig,
+      updateMask,
+    };
+
+    // Run request
+    const response = await datatransferClient.updateTransferConfig(request);
+    console.log(response);
+  }
+
+  updateTransferConfig();
+  // [END bigquerydatatransfer_v1_generated_DataTransferService_UpdateTransferConfig_async]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));
diff --git a/packages/google-cloud-bigquery-datatransfer/samples/package.json b/packages/google-cloud-bigquery-datatransfer/samples/package.json
index 625ebdc395f..b14cb493ac7 100644
--- a/packages/google-cloud-bigquery-datatransfer/samples/package.json
+++ b/packages/google-cloud-bigquery-datatransfer/samples/package.json
@@ -3,7 +3,7 @@
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {
-    "node": ">=8"
+    "node": ">=10"
   },
   "files": [
     "*.js"
diff --git a/packages/google-cloud-bigquery-datatransfer/src/v1/data_transfer_service_client.ts b/packages/google-cloud-bigquery-datatransfer/src/v1/data_transfer_service_client.ts
index 73331b026c0..3fb14963dd2 100644
--- a/packages/google-cloud-bigquery-datatransfer/src/v1/data_transfer_service_client.ts
+++ b/packages/google-cloud-bigquery-datatransfer/src/v1/data_transfer_service_client.ts
@@ -1600,7 +1600,8 @@ export class DataTransferServiceClient {
       gax.routingHeader.fromParams({
         parent: request.parent || '',
       });
-    const callSettings = new gax.CallSettings(options);
+    const defaultCallSettings = this._defaults['listDataSources'];
+    const callSettings = defaultCallSettings.merge(options);
     this.initialize();
     return this.descriptors.page.listDataSources.createStream(
       this.innerApiCalls.listDataSources as gax.GaxCall,
@@ -1656,7 +1657,8 @@ export class DataTransferServiceClient {
         parent: request.parent || '',
       });
     options = options || {};
-    const callSettings = new gax.CallSettings(options);
+    const defaultCallSettings = this._defaults['listDataSources'];
+    const callSettings = defaultCallSettings.merge(options);
     this.initialize();
     return this.descriptors.page.listDataSources.asyncIterate(
       this.innerApiCalls['listDataSources'] as GaxCall,
@@ -1814,7 +1816,8 @@ export class DataTransferServiceClient {
       gax.routingHeader.fromParams({
         parent: request.parent || '',
       });
-    const callSettings = new gax.CallSettings(options);
+    const defaultCallSettings = this._defaults['listTransferConfigs'];
+    const callSettings = defaultCallSettings.merge(options);
     this.initialize();
     return this.descriptors.page.listTransferConfigs.createStream(
       this.innerApiCalls.listTransferConfigs as gax.GaxCall,
@@ -1872,7 +1875,8 @@ export class DataTransferServiceClient {
         parent: request.parent || '',
       });
     options = options || {};
-    const callSettings = new gax.CallSettings(options);
+    const defaultCallSettings = this._defaults['listTransferConfigs'];
+    const callSettings = defaultCallSettings.merge(options);
     this.initialize();
     return this.descriptors.page.listTransferConfigs.asyncIterate(
       this.innerApiCalls['listTransferConfigs'] as GaxCall,
@@ -2035,7 +2039,8 @@ export class DataTransferServiceClient {
       gax.routingHeader.fromParams({
         parent: request.parent || '',
       });
-    const callSettings = new gax.CallSettings(options);
+    const defaultCallSettings = this._defaults['listTransferRuns'];
+    const callSettings = defaultCallSettings.merge(options);
     this.initialize();
     return this.descriptors.page.listTransferRuns.createStream(
       this.innerApiCalls.listTransferRuns as gax.GaxCall,
@@ -2096,7 +2101,8 @@ export class DataTransferServiceClient {
         parent: request.parent || '',
       });
     options = options || {};
-    const callSettings = new gax.CallSettings(options);
+    const defaultCallSettings = this._defaults['listTransferRuns'];
+    const callSettings = defaultCallSettings.merge(options);
     this.initialize();
     return this.descriptors.page.listTransferRuns.asyncIterate(
       this.innerApiCalls['listTransferRuns'] as GaxCall,
@@ -2255,7 +2261,8 @@ export class DataTransferServiceClient {
       gax.routingHeader.fromParams({
         parent: request.parent || '',
       });
-    const callSettings = new gax.CallSettings(options);
+    const defaultCallSettings = this._defaults['listTransferLogs'];
+    const callSettings = defaultCallSettings.merge(options);
     this.initialize();
     return this.descriptors.page.listTransferLogs.createStream(
       this.innerApiCalls.listTransferLogs as gax.GaxCall,
@@ -2314,7 +2321,8 @@ export class DataTransferServiceClient {
         parent: request.parent || '',
       });
     options = options || {};
-    const callSettings = new gax.CallSettings(options);
+    const defaultCallSettings = this._defaults['listTransferLogs'];
+    const callSettings = defaultCallSettings.merge(options);
     this.initialize();
     return this.descriptors.page.listTransferLogs.asyncIterate(
       this.innerApiCalls['listTransferLogs'] as GaxCall,