diff --git a/lib/public/Files/Storage/IStorage.php b/lib/public/Files/Storage/IStorage.php
index 2016c273f9103..2919e6e3d7839 100644
--- a/lib/public/Files/Storage/IStorage.php
+++ b/lib/public/Files/Storage/IStorage.php
@@ -94,7 +94,7 @@ public function is_file($path);
 	 * only the following keys are required in the result: size and mtime
 	 *
 	 * @param string $path
-	 * @return array|bool
+	 * @return array|false
 	 * @since 9.0.0
 	 */
 	public function stat($path);
@@ -103,7 +103,7 @@ public function stat($path);
 	 * see https://www.php.net/manual/en/function.filetype.php
 	 *
 	 * @param string $path
-	 * @return string|bool
+	 * @return string|false
 	 * @since 9.0.0
 	 */
 	public function filetype($path);
@@ -186,7 +186,7 @@ public function file_exists($path);
 	 * see https://www.php.net/manual/en/function.filemtime.php
 	 *
 	 * @param string $path
-	 * @return int|bool
+	 * @return int|false
 	 * @since 9.0.0
 	 */
 	public function filemtime($path);
@@ -244,7 +244,7 @@ public function copy($source, $target);
 	 *
 	 * @param string $path
 	 * @param string $mode
-	 * @return resource|bool
+	 * @return resource|false
 	 * @since 9.0.0
 	 */
 	public function fopen($path, $mode);
@@ -254,7 +254,7 @@ public function fopen($path, $mode);
 	 * The mimetype for a folder is required to be "httpd/unix-directory"
 	 *
 	 * @param string $path
-	 * @return string|bool
+	 * @return string|false
 	 * @since 9.0.0
 	 */
 	public function getMimeType($path);
@@ -265,16 +265,16 @@ public function getMimeType($path);
 	 * @param string $type
 	 * @param string $path
 	 * @param bool $raw
-	 * @return string|bool
+	 * @return string|false
 	 * @since 9.0.0
 	 */
 	public function hash($type, $path, $raw = false);
 
 	/**
-	 * see https://www.php.net/manual/en/function.free_space.php
+	 * see https://www.php.net/manual/en/function.disk-free-space.php
 	 *
 	 * @param string $path
-	 * @return int|float|bool
+	 * @return int|float|false
 	 * @since 9.0.0
 	 */
 	public function free_space($path);
@@ -352,7 +352,7 @@ public function instanceOfStorage($class);
 	 * For now the returned array can hold the parameter url - in future more attributes might follow.
 	 *
 	 * @param string $path
-	 * @return array|bool
+	 * @return array|false
 	 * @since 9.0.0
 	 */
 	public function getDirectDownload($path);