diff --git a/lib/private/Files/Cache/Cache.php b/lib/private/Files/Cache/Cache.php
index 67faed7b31bb6..bf459b2ff8691 100644
--- a/lib/private/Files/Cache/Cache.php
+++ b/lib/private/Files/Cache/Cache.php
@@ -60,6 +60,7 @@
 use OCP\Files\Search\ISearchQuery;
 use OCP\Files\Storage\IStorage;
 use OCP\IDBConnection;
+use OCP\Util;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -191,8 +192,8 @@ public static function cacheEntryFromData($data, IMimeTypeLoader $mimetypeLoader
 		$data['path'] = (string)$data['path'];
 		$data['fileid'] = (int)$data['fileid'];
 		$data['parent'] = (int)$data['parent'];
-		$data['size'] = 0 + $data['size'];
-		$data['unencrypted_size'] = 0 + ($data['unencrypted_size'] ?? 0);
+		$data['size'] = Util::numericToNumber($data['size']);
+		$data['unencrypted_size'] = Util::numericToNumber($data['unencrypted_size'] ?? 0);
 		$data['mtime'] = (int)$data['mtime'];
 		$data['storage_mtime'] = (int)$data['storage_mtime'];
 		$data['encryptedVersion'] = (int)$data['encrypted'];
@@ -882,7 +883,7 @@ public function getIncompleteChildrenCount($fileId) {
 	 *
 	 * @param string $path
 	 * @param array $entry (optional) meta data of the folder
-	 * @return int
+	 * @return int|float
 	 */
 	public function calculateFolderSize($path, $entry = null) {
 		$totalSize = 0;
@@ -903,13 +904,13 @@ public function calculateFolderSize($path, $entry = null) {
 
 			if ($rows) {
 				$sizes = array_map(function (array $row) {
-					return (int)$row['size'];
+					return Util::numericToNumber($row['size']);
 				}, $rows);
 				$unencryptedOnlySizes = array_map(function (array $row) {
-					return (int)$row['unencrypted_size'];
+					return Util::numericToNumber($row['unencrypted_size']);
 				}, $rows);
 				$unencryptedSizes = array_map(function (array $row) {
-					return (int)(($row['unencrypted_size'] > 0) ? $row['unencrypted_size'] : $row['size']);
+					return Util::numericToNumber(($row['unencrypted_size'] > 0) ? $row['unencrypted_size'] : $row['size']);
 				}, $rows);
 
 				$sum = array_sum($sizes);
diff --git a/lib/private/Files/Cache/HomeCache.php b/lib/private/Files/Cache/HomeCache.php
index 6b6b94c3f2034..cd6408a86f691 100644
--- a/lib/private/Files/Cache/HomeCache.php
+++ b/lib/private/Files/Cache/HomeCache.php
@@ -36,7 +36,7 @@ class HomeCache extends Cache {
 	 *
 	 * @param string $path
 	 * @param array $entry (optional) meta data of the folder
-	 * @return int
+	 * @return int|float
 	 */
 	public function calculateFolderSize($path, $entry = null) {
 		if ($path !== '/' and $path !== '' and $path !== 'files' and $path !== 'files_trashbin' and $path !== 'files_versions') {
diff --git a/lib/private/Files/Cache/Scanner.php b/lib/private/Files/Cache/Scanner.php
index f7d1d105d83ca..42f8f1b375bc9 100644
--- a/lib/private/Files/Cache/Scanner.php
+++ b/lib/private/Files/Cache/Scanner.php
@@ -368,7 +368,7 @@ protected function getExistingChildren($folderId) {
 	 * @param int $folderId id for the folder to be scanned
 	 * @param bool $lock set to false to disable getting an additional read lock during scanning
 	 * @param array $data the data of the folder before (re)scanning the children
-	 * @return int the size of the scanned folder or -1 if the size is unknown at this stage
+	 * @return int|float the size of the scanned folder or -1 if the size is unknown at this stage
 	 */
 	protected function scanChildren($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $folderId = null, $lock = true, array $data = []) {
 		if ($reuse === -1) {
diff --git a/lib/private/Files/Cache/Wrapper/CacheJail.php b/lib/private/Files/Cache/Wrapper/CacheJail.php
index 628ca3ee0e0e3..9649ae3541bd8 100644
--- a/lib/private/Files/Cache/Wrapper/CacheJail.php
+++ b/lib/private/Files/Cache/Wrapper/CacheJail.php
@@ -240,7 +240,7 @@ public function correctFolderSize($path, $data = null, $isBackgroundScan = false
 	 *
 	 * @param string $path
 	 * @param array $entry (optional) meta data of the folder
-	 * @return int
+	 * @return int|float
 	 */
 	public function calculateFolderSize($path, $entry = null) {
 		if ($this->getCache() instanceof Cache) {
diff --git a/lib/private/Files/Cache/Wrapper/CacheWrapper.php b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
index 2cd378ad23cd5..f6bb949f96819 100644
--- a/lib/private/Files/Cache/Wrapper/CacheWrapper.php
+++ b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
@@ -250,7 +250,7 @@ public function correctFolderSize($path, $data = null, $isBackgroundScan = false
 	 *
 	 * @param string $path
 	 * @param array $entry (optional) meta data of the folder
-	 * @return int
+	 * @return int|float
 	 */
 	public function calculateFolderSize($path, $entry = null) {
 		if ($this->getCache() instanceof Cache) {
diff --git a/lib/private/Files/Storage/DAV.php b/lib/private/Files/Storage/DAV.php
index 0c4a81b7491bc..84916f19ac0f9 100644
--- a/lib/private/Files/Storage/DAV.php
+++ b/lib/private/Files/Storage/DAV.php
@@ -50,6 +50,7 @@
 use OCP\Files\StorageNotAvailableException;
 use OCP\Http\Client\IClientService;
 use OCP\ICertificateManager;
+use OCP\Util;
 use Psr\Http\Message\ResponseInterface;
 use Sabre\DAV\Client;
 use Sabre\DAV\Xml\Property\ResourceType;
@@ -433,7 +434,7 @@ public function free_space($path) {
 				return FileInfo::SPACE_UNKNOWN;
 			}
 			if (isset($response['{DAV:}quota-available-bytes'])) {
-				return (int)$response['{DAV:}quota-available-bytes'];
+				return Util::numericToNumber($response['{DAV:}quota-available-bytes']);
 			} else {
 				return FileInfo::SPACE_UNKNOWN;
 			}
@@ -587,7 +588,7 @@ public function stat($path) {
 			}
 			return [
 				'mtime' => isset($response['{DAV:}getlastmodified']) ? strtotime($response['{DAV:}getlastmodified']) : null,
-				'size' => (int)($response['{DAV:}getcontentlength'] ?? 0),
+				'size' => Util::numericToNumber($response['{DAV:}getcontentlength'] ?? 0),
 			];
 		} catch (\Exception $e) {
 			$this->convertException($e, $path);
diff --git a/lib/private/Files/Storage/Local.php b/lib/private/Files/Storage/Local.php
index a375a5443003d..6dad028155b56 100644
--- a/lib/private/Files/Storage/Local.php
+++ b/lib/private/Files/Storage/Local.php
@@ -52,6 +52,7 @@
 use OCP\Files\IMimeTypeDetector;
 use OCP\Files\Storage\IStorage;
 use OCP\IConfig;
+use OCP\Util;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -422,7 +423,7 @@ public function free_space($path) {
 		if ($space === false || is_null($space)) {
 			return \OCP\Files\FileInfo::SPACE_UNKNOWN;
 		}
-		return (int)$space;
+		return Util::numericToNumber($space);
 	}
 
 	public function search($query) {