diff --git a/lib/private/Files/Storage/Common.php b/lib/private/Files/Storage/Common.php
index 8e7e56e6ca230..722333ec6bf6e 100644
--- a/lib/private/Files/Storage/Common.php
+++ b/lib/private/Files/Storage/Common.php
@@ -472,7 +472,7 @@ public function test() {
 	 * get the free space in the storage
 	 *
 	 * @param string $path
-	 * @return int|false
+	 * @return int|float|false
 	 */
 	public function free_space($path) {
 		return \OCP\Files\FileInfo::SPACE_UNKNOWN;
@@ -518,7 +518,6 @@ public function getDirectDownload($path) {
 	 * @throws InvalidPathException
 	 */
 	public function verifyPath($path, $fileName) {
-
 		// verify empty and dot files
 		$trimmed = trim($fileName);
 		if ($trimmed === '') {
diff --git a/lib/private/Files/Storage/DAV.php b/lib/private/Files/Storage/DAV.php
index b7d1c4bbc1066..7c66303be6d3b 100644
--- a/lib/private/Files/Storage/DAV.php
+++ b/lib/private/Files/Storage/DAV.php
@@ -487,7 +487,7 @@ public function touch($path, $mtime = null) {
 	/**
 	 * @param string $path
 	 * @param mixed $data
-	 * @return int|false
+	 * @return int|float|false
 	 */
 	public function file_put_contents($path, $data) {
 		$path = $this->cleanPath($path);
diff --git a/lib/private/Files/Storage/Local.php b/lib/private/Files/Storage/Local.php
index 990ebdc20ab58..4611a6a86d904 100644
--- a/lib/private/Files/Storage/Local.php
+++ b/lib/private/Files/Storage/Local.php
@@ -591,6 +591,7 @@ public function moveFromStorage(IStorage $sourceStorage, $sourceInternalPath, $t
 	}
 
 	public function writeStream(string $path, $stream, int $size = null): int {
+		/** @var int|false $result We consider here that returned size will never be a float because we write less than 4GB */
 		$result = $this->file_put_contents($path, $stream);
 		if (is_resource($stream)) {
 			fclose($stream);
diff --git a/lib/private/Files/Storage/Wrapper/Encoding.php b/lib/private/Files/Storage/Wrapper/Encoding.php
index d6201dc88776c..fbf8ac050af80 100644
--- a/lib/private/Files/Storage/Wrapper/Encoding.php
+++ b/lib/private/Files/Storage/Wrapper/Encoding.php
@@ -40,7 +40,6 @@
  * the actual given name and then try its NFD form.
  */
 class Encoding extends Wrapper {
-
 	/**
 	 * @var ICache
 	 */
@@ -213,7 +212,7 @@ public function filetype($path) {
 	 * The result for filesize when called on a folder is required to be 0
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 */
 	public function filesize($path) {
 		return $this->storage->filesize($this->findPathToUse($path));
@@ -315,7 +314,7 @@ public function file_get_contents($path) {
 	 *
 	 * @param string $path
 	 * @param mixed $data
-	 * @return int|false
+	 * @return int|float|false
 	 */
 	public function file_put_contents($path, $data) {
 		return $this->storage->file_put_contents($this->findPathToUse($path), $data);
@@ -400,7 +399,7 @@ public function hash($type, $path, $raw = false) {
 	 * see https://www.php.net/manual/en/function.free_space.php
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 */
 	public function free_space($path) {
 		return $this->storage->free_space($this->findPathToUse($path));
diff --git a/lib/private/Files/Storage/Wrapper/Jail.php b/lib/private/Files/Storage/Wrapper/Jail.php
index 65ee6f1181ad7..b817073d2e096 100644
--- a/lib/private/Files/Storage/Wrapper/Jail.php
+++ b/lib/private/Files/Storage/Wrapper/Jail.php
@@ -160,7 +160,7 @@ public function filetype($path) {
 	 * The result for filesize when called on a folder is required to be 0
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 */
 	public function filesize($path) {
 		return $this->getWrapperStorage()->filesize($this->getUnjailedPath($path));
@@ -262,7 +262,7 @@ public function file_get_contents($path) {
 	 *
 	 * @param string $path
 	 * @param mixed $data
-	 * @return int|false
+	 * @return int|float|false
 	 */
 	public function file_put_contents($path, $data) {
 		return $this->getWrapperStorage()->file_put_contents($this->getUnjailedPath($path), $data);
@@ -338,7 +338,7 @@ public function hash($type, $path, $raw = false) {
 	 * see https://www.php.net/manual/en/function.free_space.php
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 */
 	public function free_space($path) {
 		return $this->getWrapperStorage()->free_space($this->getUnjailedPath($path));
diff --git a/lib/private/Files/Storage/Wrapper/Quota.php b/lib/private/Files/Storage/Wrapper/Quota.php
index 154c448999c6a..fcdce59f1ea12 100644
--- a/lib/private/Files/Storage/Wrapper/Quota.php
+++ b/lib/private/Files/Storage/Wrapper/Quota.php
@@ -37,10 +37,7 @@
 use OCP\Files\Storage\IStorage;
 
 class Quota extends Wrapper {
-
-	/**
-	 * @var int $quota
-	 */
+	/** @var int|float int on 64bits, float on 32bits for bigint */
 	protected $quota;
 
 	/**
@@ -61,7 +58,7 @@ public function __construct($parameters) {
 	}
 
 	/**
-	 * @return int quota value
+	 * @return int|float quota value
 	 */
 	public function getQuota() {
 		return $this->quota;
@@ -69,7 +66,8 @@ public function getQuota() {
 
 	/**
 	 * @param string $path
-	 * @param \OC\Files\Storage\Storage $storage
+	 * @param IStorage $storage
+	 * @return int|float
 	 */
 	protected function getSize($path, $storage = null) {
 		if ($this->config->getValue('quota_include_external_storage', false)) {
@@ -97,7 +95,7 @@ protected function getSize($path, $storage = null) {
 	 * Get free space as limited by the quota
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 */
 	public function free_space($path) {
 		if ($this->quota < 0 || strpos($path, 'cache') === 0 || strpos($path, 'uploads') === 0) {
@@ -125,7 +123,7 @@ public function free_space($path) {
 	 *
 	 * @param string $path
 	 * @param mixed $data
-	 * @return int|false
+	 * @return int|float|false
 	 */
 	public function file_put_contents($path, $data) {
 		$free = $this->free_space($path);
@@ -165,7 +163,7 @@ public function fopen($path, $mode) {
 		// don't apply quota for part files
 		if (!$this->isPartFile($path)) {
 			$free = $this->free_space($path);
-			if ($source && is_int($free) && $free >= 0 && $mode !== 'r' && $mode !== 'rb') {
+			if ($source && (is_int($free) || is_float($free)) && $free >= 0 && $mode !== 'r' && $mode !== 'rb') {
 				// only apply quota for files, not metadata, trash or others
 				if ($this->shouldApplyQuota($path)) {
 					return \OC\Files\Stream\Quota::wrap($source, $free);
@@ -179,7 +177,7 @@ public function fopen($path, $mode) {
 	 * Checks whether the given path is a part file
 	 *
 	 * @param string $path Path that may identify a .part file
-	 * @return string File path without .part extension
+	 * @return bool
 	 * @note this is needed for reusing keys
 	 */
 	private function isPartFile($path) {
diff --git a/lib/private/Files/Storage/Wrapper/Wrapper.php b/lib/private/Files/Storage/Wrapper/Wrapper.php
index 6bc66bf9c8929..5a3fc7567c2b5 100644
--- a/lib/private/Files/Storage/Wrapper/Wrapper.php
+++ b/lib/private/Files/Storage/Wrapper/Wrapper.php
@@ -150,7 +150,7 @@ public function filetype($path) {
 	 * The result for filesize when called on a folder is required to be 0
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 */
 	public function filesize($path) {
 		return $this->getWrapperStorage()->filesize($path);
@@ -252,7 +252,7 @@ public function file_get_contents($path) {
 	 *
 	 * @param string $path
 	 * @param mixed $data
-	 * @return int|false
+	 * @return int|float|false
 	 */
 	public function file_put_contents($path, $data) {
 		return $this->getWrapperStorage()->file_put_contents($path, $data);
@@ -328,7 +328,7 @@ public function hash($type, $path, $raw = false) {
 	 * see https://www.php.net/manual/en/function.free_space.php
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 */
 	public function free_space($path) {
 		return $this->getWrapperStorage()->free_space($path);
diff --git a/lib/private/LargeFileHelper.php b/lib/private/LargeFileHelper.php
index e2984b4bacf22..c7910f648c6a7 100755
--- a/lib/private/LargeFileHelper.php
+++ b/lib/private/LargeFileHelper.php
@@ -95,7 +95,7 @@ public function formatUnsignedInteger($number) {
 	 *
 	 * @param string $filename Path to the file.
 	 *
-	 * @return null|int|float Number of bytes as number (float or int) or
+	 * @return int|float Number of bytes as number (float or int) or
 	 *                        null on failure.
 	 */
 	public function getFileSize($filename) {
diff --git a/lib/public/Files/Storage.php b/lib/public/Files/Storage.php
index 0a1a504b13762..827ff962da863 100644
--- a/lib/public/Files/Storage.php
+++ b/lib/public/Files/Storage.php
@@ -135,7 +135,7 @@ public function filetype($path);
 	 * The result for filesize when called on a folder is required to be 0
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 * @since 6.0.0
 	 */
 	public function filesize($path);
@@ -227,7 +227,7 @@ public function file_get_contents($path);
 	 *
 	 * @param string $path
 	 * @param mixed $data
-	 * @return int|false
+	 * @return int|float|false
 	 * @since 6.0.0
 	 */
 	public function file_put_contents($path, $data);
@@ -296,7 +296,7 @@ public function hash($type, $path, $raw = false);
 	 * see https://www.php.net/manual/en/function.free_space.php
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 * @since 6.0.0
 	 */
 	public function free_space($path);
diff --git a/lib/public/Files/Storage/IStorage.php b/lib/public/Files/Storage/IStorage.php
index f42eb81bfecd5..8dacd4358ee6b 100644
--- a/lib/public/Files/Storage/IStorage.php
+++ b/lib/public/Files/Storage/IStorage.php
@@ -132,7 +132,7 @@ public function filetype($path);
 	 * The result for filesize when called on a folder is required to be 0
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 * @since 9.0.0
 	 */
 	public function filesize($path);
@@ -224,7 +224,7 @@ public function file_get_contents($path);
 	 *
 	 * @param string $path
 	 * @param mixed $data
-	 * @return int|false
+	 * @return int|float|false
 	 * @since 9.0.0
 	 */
 	public function file_put_contents($path, $data);
@@ -293,7 +293,7 @@ public function hash($type, $path, $raw = false);
 	 * see https://www.php.net/manual/en/function.free_space.php
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|float|bool
 	 * @since 9.0.0
 	 */
 	public function free_space($path);