diff --git a/changelog/unreleased/configurable-s3-put-options.md b/changelog/unreleased/configurable-s3-put-options.md
new file mode 100644
index 0000000000..aeb57ab203
--- /dev/null
+++ b/changelog/unreleased/configurable-s3-put-options.md
@@ -0,0 +1,5 @@
+Enhancement: configurable s3 put options
+
+The s3ng blobstore can now be configured with several options: `s3.disable_content_sha254`, `s3.disable_multipart`, `s3.send_content_md5`, `s3.concurrent_stream_parts`, `s3.num_threads` and `s3.part_size`. If unset we default to `s3.send_content_md5: true`, which was hardcoded before. We also default to `s3.concurrent_stream_parts: true` and `s3.num_threads: 4` to allow concurrent uploads even when `s3.send_content_md5` is set to `true`. When tweaking the uploads try setting `s3.send_content_md5: false` and `s3.concurrent_stream_parts: false` first, as this will try to concurrently stream an uploaded file to the s3 store without cutting it into parts first.
+
+https://github.com/cs3org/reva/pull/4526
diff --git a/pkg/storage/fs/s3ng/blobstore/blobstore.go b/pkg/storage/fs/s3ng/blobstore/blobstore.go
index 9c744e7540..48a40b764f 100644
--- a/pkg/storage/fs/s3ng/blobstore/blobstore.go
+++ b/pkg/storage/fs/s3ng/blobstore/blobstore.go
@@ -37,11 +37,22 @@ import (
 type Blobstore struct {
 	client *minio.Client
 
+	defaultPutOptions Options
+
 	bucket string
 }
 
+type Options struct {
+	DisableContentSha256  bool
+	DisableMultipart      bool
+	SendContentMd5        bool
+	ConcurrentStreamParts bool
+	NumThreads            uint
+	PartSize              uint64
+}
+
 // New returns a new Blobstore
-func New(endpoint, region, bucket, accessKey, secretKey string) (*Blobstore, error) {
+func New(endpoint, region, bucket, accessKey, secretKey string, defaultPutOptions Options) (*Blobstore, error) {
 	u, err := url.Parse(endpoint)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to parse s3 endpoint")
@@ -58,8 +69,9 @@ func New(endpoint, region, bucket, accessKey, secretKey string) (*Blobstore, err
 	}
 
 	return &Blobstore{
-		client: client,
-		bucket: bucket,
+		client:            client,
+		bucket:            bucket,
+		defaultPutOptions: defaultPutOptions,
 	}, nil
 }
 
@@ -71,7 +83,15 @@ func (bs *Blobstore) Upload(node *node.Node, source string) error {
 	}
 	defer reader.Close()
 
-	_, err = bs.client.PutObject(context.Background(), bs.bucket, bs.path(node), reader, node.Blobsize, minio.PutObjectOptions{ContentType: "application/octet-stream", SendContentMd5: true})
+	_, err = bs.client.PutObject(context.Background(), bs.bucket, bs.path(node), reader, node.Blobsize, minio.PutObjectOptions{
+		ContentType:           "application/octet-stream",
+		SendContentMd5:        bs.defaultPutOptions.SendContentMd5,
+		ConcurrentStreamParts: bs.defaultPutOptions.ConcurrentStreamParts,
+		NumThreads:            bs.defaultPutOptions.NumThreads,
+		PartSize:              bs.defaultPutOptions.PartSize,
+		DisableMultipart:      bs.defaultPutOptions.DisableMultipart,
+		DisableContentSha256:  bs.defaultPutOptions.DisableContentSha256,
+	})
 
 	if err != nil {
 		return errors.Wrapf(err, "could not store object '%s' into bucket '%s'", bs.path(node), bs.bucket)
diff --git a/pkg/storage/fs/s3ng/option.go b/pkg/storage/fs/s3ng/option.go
index 877a7d7189..54c038af79 100644
--- a/pkg/storage/fs/s3ng/option.go
+++ b/pkg/storage/fs/s3ng/option.go
@@ -43,6 +43,24 @@ type Options struct {
 
 	// Secret key for the s3 blobstore
 	S3SecretKey string `mapstructure:"s3.secret_key"`
+
+	// disable sending content sha256
+	DisableContentSha256 bool `mapstructure:"s3.disable_content_sha254"`
+
+	// disable multipart uploads
+	DisableMultipart bool `mapstructure:"s3.disable_multipart"`
+
+	// enable sending content md5, defaults to true if unset
+	SendContentMd5 bool `mapstructure:"s3.send_content_md5"`
+
+	// use concurrent stream parts
+	ConcurrentStreamParts bool `mapstructure:"s3.concurrent_stream_parts"`
+
+	// number of concurrent uploads
+	NumThreads uint `mapstructure:"s3.num_threads"`
+
+	// part size for concurrent uploads
+	PartSize uint64 `mapstructure:"s3.part_size"`
 }
 
 // S3ConfigComplete return true if all required s3 fields are set
@@ -60,5 +78,16 @@ func parseConfig(m map[string]interface{}) (*Options, error) {
 		err = errors.Wrap(err, "error decoding conf")
 		return nil, err
 	}
+
+	// if unset we set these defaults
+	if m["s3.send_content_md5"] == nil {
+		o.SendContentMd5 = true
+	}
+	if m["s3.concurrent_stream_parts"] == nil {
+		o.ConcurrentStreamParts = true
+	}
+	if m["s3.num_threads"] == nil {
+		o.NumThreads = 4
+	}
 	return o, nil
 }
diff --git a/pkg/storage/fs/s3ng/s3ng.go b/pkg/storage/fs/s3ng/s3ng.go
index 5cc7f8873b..16360c898b 100644
--- a/pkg/storage/fs/s3ng/s3ng.go
+++ b/pkg/storage/fs/s3ng/s3ng.go
@@ -44,7 +44,16 @@ func New(m map[string]interface{}, stream events.Stream) (storage.FS, error) {
 		return nil, fmt.Errorf("S3 configuration incomplete")
 	}
 
-	bs, err := blobstore.New(o.S3Endpoint, o.S3Region, o.S3Bucket, o.S3AccessKey, o.S3SecretKey)
+	defaultPutOptions := blobstore.Options{
+		DisableContentSha256:  o.DisableContentSha256,
+		DisableMultipart:      o.DisableMultipart,
+		SendContentMd5:        o.SendContentMd5,
+		ConcurrentStreamParts: o.ConcurrentStreamParts,
+		NumThreads:            o.NumThreads,
+		PartSize:              o.PartSize,
+	}
+
+	bs, err := blobstore.New(o.S3Endpoint, o.S3Region, o.S3Bucket, o.S3AccessKey, o.S3SecretKey, defaultPutOptions)
 	if err != nil {
 		return nil, err
 	}