diff --git a/apps/files_external/lib/Lib/Storage/AmazonS3.php b/apps/files_external/lib/Lib/Storage/AmazonS3.php
index b2d6d24db5eff..be07314311e6a 100644
--- a/apps/files_external/lib/Lib/Storage/AmazonS3.php
+++ b/apps/files_external/lib/Lib/Storage/AmazonS3.php
@@ -59,11 +59,7 @@ public function __construct($parameters) {
 		$this->logger = Server::get(LoggerInterface::class);
 	}
 
-	/**
-	 * @param string $path
-	 * @return string correctly encoded path
-	 */
-	private function normalizePath($path): string {
+	private function normalizePath(string $path): string {
 		$path = trim($path, '/');
 
 		if (!$path) {
@@ -73,11 +69,11 @@ private function normalizePath($path): string {
 		return $path;
 	}
 
-	private function isRoot($path): bool {
+	private function isRoot(string $path): bool {
 		return $path === '.';
 	}
 
-	private function cleanKey($path): string {
+	private function cleanKey(string $path): string {
 		if ($this->isRoot($path)) {
 			return '/';
 		}
@@ -90,7 +86,7 @@ private function clearCache(): void {
 		$this->filesCache = new CappedMemoryCache();
 	}
 
-	private function invalidateCache($key): void {
+	private function invalidateCache(string $key): void {
 		unset($this->objectCache[$key]);
 		$keys = array_keys($this->objectCache->getData());
 		$keyLength = strlen($key);
@@ -143,7 +139,7 @@ private function headObject(string $key): array|false {
 	 *
 	 * @throws \Exception
 	 */
-	private function doesDirectoryExist($path): bool {
+	private function doesDirectoryExist(string $path): bool {
 		if ($path === '.' || $path === '') {
 			return true;
 		}
@@ -185,7 +181,7 @@ private function doesDirectoryExist($path): bool {
 		return false;
 	}
 
-	protected function remove($path): bool {
+	protected function remove(string $path): bool {
 		// remember fileType to reduce http calls
 		$fileType = $this->filetype($path);
 		if ($fileType === 'dir') {
@@ -197,7 +193,7 @@ protected function remove($path): bool {
 		}
 	}
 
-	public function mkdir($path): bool {
+	public function mkdir(string $path): bool {
 		$path = $this->normalizePath($path);
 
 		if ($this->is_dir($path)) {
@@ -225,12 +221,12 @@ public function mkdir($path): bool {
 		return true;
 	}
 
-	public function file_exists($path): bool {
+	public function file_exists(string $path): bool {
 		return $this->filetype($path) !== false;
 	}
 
 
-	public function rmdir($path): bool {
+	public function rmdir(string $path): bool {
 		$path = $this->normalizePath($path);
 
 		if ($this->isRoot($path)) {
@@ -250,7 +246,7 @@ protected function clearBucket(): bool {
 		return $this->batchDelete();
 	}
 
-	private function batchDelete($path = null): bool {
+	private function batchDelete(?string $path = null): bool {
 		// TODO explore using https://docs.aws.amazon.com/aws-sdk-php/v3/api/class-Aws.S3.BatchDelete.html
 		$params = [
 			'Bucket' => $this->bucket
@@ -290,7 +286,7 @@ private function batchDelete($path = null): bool {
 		return true;
 	}
 
-	public function opendir($path) {
+	public function opendir(string $path) {
 		try {
 			$content = iterator_to_array($this->getDirectoryContent($path));
 			return IteratorDirectory::wrap(array_map(function (array $item) {
@@ -301,7 +297,7 @@ public function opendir($path) {
 		}
 	}
 
-	public function stat($path): array|false {
+	public function stat(string $path): array|false {
 		$path = $this->normalizePath($path);
 
 		if ($this->is_dir($path)) {
@@ -324,7 +320,7 @@ public function stat($path): array|false {
 	 * When the information is already present (e.g. opendir has been called before)
 	 * this value is return. Otherwise a headObject is emitted.
 	 */
-	private function getContentLength($path): int {
+	private function getContentLength(string $path): int {
 		if (isset($this->filesCache[$path])) {
 			return (int)$this->filesCache[$path]['ContentLength'];
 		}
@@ -343,7 +339,7 @@ private function getContentLength($path): int {
 	 * When the information is already present (e.g. opendir has been called before)
 	 * this value is return. Otherwise a headObject is emitted.
 	 */
-	private function getLastModified($path): string {
+	private function getLastModified(string $path): string {
 		if (isset($this->filesCache[$path])) {
 			return $this->filesCache[$path]['LastModified'];
 		}
@@ -356,7 +352,7 @@ private function getLastModified($path): string {
 		return 'now';
 	}
 
-	public function is_dir($path): bool {
+	public function is_dir(string $path): bool {
 		$path = $this->normalizePath($path);
 
 		if (isset($this->filesCache[$path])) {
@@ -374,7 +370,7 @@ public function is_dir($path): bool {
 		}
 	}
 
-	public function filetype($path): string|false {
+	public function filetype(string $path): string|false {
 		$path = $this->normalizePath($path);
 
 		if ($this->isRoot($path)) {
@@ -402,7 +398,7 @@ public function filetype($path): string|false {
 		return false;
 	}
 
-	public function getPermissions($path): int {
+	public function getPermissions(string $path): int {
 		$type = $this->filetype($path);
 		if (!$type) {
 			return 0;
@@ -410,7 +406,7 @@ public function getPermissions($path): int {
 		return $type === 'dir' ? Constants::PERMISSION_ALL : Constants::PERMISSION_ALL - Constants::PERMISSION_CREATE;
 	}
 
-	public function unlink($path): bool {
+	public function unlink(string $path): bool {
 		$path = $this->normalizePath($path);
 
 		if ($this->is_dir($path)) {
@@ -431,7 +427,7 @@ public function unlink($path): bool {
 		return true;
 	}
 
-	public function fopen($path, $mode) {
+	public function fopen(string $path, string $mode) {
 		$path = $this->normalizePath($path);
 
 		switch ($mode) {
@@ -489,7 +485,7 @@ public function fopen($path, $mode) {
 		return false;
 	}
 
-	public function touch($path, $mtime = null): bool {
+	public function touch(string $path, ?int $mtime = null): bool {
 		if (is_null($mtime)) {
 			$mtime = time();
 		}
@@ -524,7 +520,7 @@ public function touch($path, $mtime = null): bool {
 		return true;
 	}
 
-	public function copy($source, $target, $isFile = null): bool {
+	public function copy(string $source, string $target, ?bool $isFile = null): bool {
 		$source = $this->normalizePath($source);
 		$target = $this->normalizePath($target);
 
@@ -567,7 +563,7 @@ public function copy($source, $target, $isFile = null): bool {
 		return true;
 	}
 
-	public function rename($source, $target): bool {
+	public function rename(string $source, string $target): bool {
 		$source = $this->normalizePath($source);
 		$target = $this->normalizePath($target);
 
@@ -605,7 +601,7 @@ public function getId(): string {
 		return $this->id;
 	}
 
-	public function writeBack($tmpFile, $path): bool {
+	public function writeBack(string $tmpFile, string $path): bool {
 		try {
 			$source = fopen($tmpFile, 'r');
 			$this->writeObject($path, $source, $this->mimeDetector->detectPath($path));
@@ -629,7 +625,7 @@ public static function checkDependencies(): bool {
 		return true;
 	}
 
-	public function getDirectoryContent($directory): \Traversable {
+	public function getDirectoryContent(string $directory): \Traversable {
 		$path = $this->normalizePath($directory);
 
 		if ($this->isRoot($path)) {
@@ -726,7 +722,7 @@ protected function getVersioningStatusFromBucket(): bool {
 		}
 	}
 
-	public function hasUpdated($path, $time): bool {
+	public function hasUpdated(string $path, int $time): bool {
 		// for files we can get the proper mtime
 		if ($path !== '' && $object = $this->headObject($path)) {
 			$stat = $this->objectToMetaData($object);
diff --git a/apps/files_external/lib/Lib/Storage/FTP.php b/apps/files_external/lib/Lib/Storage/FTP.php
index 514492156b64f..142fa746184a3 100644
--- a/apps/files_external/lib/Lib/Storage/FTP.php
+++ b/apps/files_external/lib/Lib/Storage/FTP.php
@@ -82,7 +82,7 @@ public function getId(): string {
 		return 'ftp::' . $this->username . '@' . $this->host . '/' . $this->root;
 	}
 
-	protected function buildPath($path): string {
+	protected function buildPath(string $path): string {
 		return rtrim($this->root . '/' . $path, '/');
 	}
 
@@ -94,7 +94,7 @@ public static function checkDependencies(): array|bool {
 		}
 	}
 
-	public function filemtime($path): int|false {
+	public function filemtime(string $path): int|false {
 		$result = $this->getConnection()->mdtm($this->buildPath($path));
 
 		if ($result === -1) {
@@ -126,7 +126,7 @@ public function filemtime($path): int|false {
 		}
 	}
 
-	public function filesize($path): false|int|float {
+	public function filesize(string $path): false|int|float {
 		$result = $this->getConnection()->size($this->buildPath($path));
 		if ($result === -1) {
 			return false;
@@ -135,7 +135,7 @@ public function filesize($path): false|int|float {
 		}
 	}
 
-	public function rmdir($path): bool {
+	public function rmdir(string $path): bool {
 		if ($this->is_dir($path)) {
 			$result = $this->getConnection()->rmdir($this->buildPath($path));
 			// recursive rmdir support depends on the ftp server
@@ -151,10 +151,7 @@ public function rmdir($path): bool {
 		}
 	}
 
-	/**
-	 * @param string $path
-	 */
-	private function recursiveRmDir($path): bool {
+	private function recursiveRmDir(string $path): bool {
 		$contents = $this->getDirectoryContent($path);
 		$result = true;
 		foreach ($contents as $content) {
@@ -177,7 +174,7 @@ public function test(): bool {
 		}
 	}
 
-	public function stat($path): array|false {
+	public function stat(string $path): array|false {
 		if (!$this->file_exists($path)) {
 			return false;
 		}
@@ -187,14 +184,14 @@ public function stat($path): array|false {
 		];
 	}
 
-	public function file_exists($path): bool {
+	public function file_exists(string $path): bool {
 		if ($path === '' || $path === '.' || $path === '/') {
 			return true;
 		}
 		return $this->filetype($path) !== false;
 	}
 
-	public function unlink($path): bool {
+	public function unlink(string $path): bool {
 		switch ($this->filetype($path)) {
 			case 'dir':
 				return $this->rmdir($path);
@@ -205,19 +202,19 @@ public function unlink($path): bool {
 		}
 	}
 
-	public function opendir($path) {
+	public function opendir(string $path) {
 		$files = $this->getConnection()->nlist($this->buildPath($path));
 		return IteratorDirectory::wrap($files);
 	}
 
-	public function mkdir($path): bool {
+	public function mkdir(string $path): bool {
 		if ($this->is_dir($path)) {
 			return false;
 		}
 		return $this->getConnection()->mkdir($this->buildPath($path)) !== false;
 	}
 
-	public function is_dir($path): bool {
+	public function is_dir(string $path): bool {
 		if ($path === '') {
 			return true;
 		}
@@ -229,11 +226,11 @@ public function is_dir($path): bool {
 		}
 	}
 
-	public function is_file($path): bool {
+	public function is_file(string $path): bool {
 		return $this->filesize($path) !== false;
 	}
 
-	public function filetype($path): string|false {
+	public function filetype(string $path): string|false {
 		if ($this->is_dir($path)) {
 			return 'dir';
 		} elseif ($this->is_file($path)) {
@@ -243,7 +240,7 @@ public function filetype($path): string|false {
 		}
 	}
 
-	public function fopen($path, $mode) {
+	public function fopen(string $path, string $mode) {
 		$useExisting = true;
 		switch ($mode) {
 			case 'r':
@@ -309,7 +306,7 @@ public function readStream(string $path) {
 		return $stream;
 	}
 
-	public function touch($path, $mtime = null): bool {
+	public function touch(string $path, ?int $mtime = null): bool {
 		if ($this->file_exists($path)) {
 			return false;
 		} else {
@@ -318,12 +315,12 @@ public function touch($path, $mtime = null): bool {
 		}
 	}
 
-	public function rename($source, $target): bool {
+	public function rename(string $source, string $target): bool {
 		$this->unlink($target);
 		return $this->getConnection()->rename($this->buildPath($source), $this->buildPath($target));
 	}
 
-	public function getDirectoryContent($directory): \Traversable {
+	public function getDirectoryContent(string $directory): \Traversable {
 		$files = $this->getConnection()->mlsd($this->buildPath($directory));
 		$mimeTypeDetector = \OC::$server->getMimeTypeDetector();
 
diff --git a/apps/files_external/lib/Lib/Storage/SFTP.php b/apps/files_external/lib/Lib/Storage/SFTP.php
index c8e01a058ff15..e5188db9bccc2 100644
--- a/apps/files_external/lib/Lib/Storage/SFTP.php
+++ b/apps/files_external/lib/Lib/Storage/SFTP.php
@@ -39,7 +39,7 @@ class SFTP extends Common {
 	 * @param string $host protocol://server:port
 	 * @return array [$server, $port]
 	 */
-	private function splitHost($host): array {
+	private function splitHost(string $host): array {
 		$input = $host;
 		if (!str_contains($host, '://')) {
 			// add a protocol to fix parse_url behavior with ipv6
@@ -163,10 +163,7 @@ public function getUser(): string {
 		return $this->user;
 	}
 
-	/**
-	 * @param string $path
-	 */
-	private function absPath($path): string {
+	private function absPath(string $path): string {
 		return $this->root . $this->cleanPath($path);
 	}
 
@@ -185,7 +182,7 @@ private function hostKeysPath(): string|false {
 		return false;
 	}
 
-	protected function writeHostKeys($keys): bool {
+	protected function writeHostKeys(array $keys): bool {
 		try {
 			$keyPath = $this->hostKeysPath();
 			if ($keyPath && file_exists($keyPath)) {
@@ -224,7 +221,7 @@ protected function readHostKeys(): array {
 		return [];
 	}
 
-	public function mkdir($path): bool {
+	public function mkdir(string $path): bool {
 		try {
 			return $this->getConnection()->mkdir($this->absPath($path));
 		} catch (\Exception $e) {
@@ -232,7 +229,7 @@ public function mkdir($path): bool {
 		}
 	}
 
-	public function rmdir($path): bool {
+	public function rmdir(string $path): bool {
 		try {
 			$result = $this->getConnection()->delete($this->absPath($path), true);
 			// workaround: stray stat cache entry when deleting empty folders
@@ -244,7 +241,7 @@ public function rmdir($path): bool {
 		}
 	}
 
-	public function opendir($path) {
+	public function opendir(string $path) {
 		try {
 			$list = $this->getConnection()->nlist($this->absPath($path));
 			if ($list === false) {
@@ -264,7 +261,7 @@ public function opendir($path) {
 		}
 	}
 
-	public function filetype($path): string|false {
+	public function filetype(string $path): string|false {
 		try {
 			$stat = $this->getConnection()->stat($this->absPath($path));
 			if (!is_array($stat) || !array_key_exists('type', $stat)) {
@@ -282,7 +279,7 @@ public function filetype($path): string|false {
 		return false;
 	}
 
-	public function file_exists($path): bool {
+	public function file_exists(string $path): bool {
 		try {
 			return $this->getConnection()->stat($this->absPath($path)) !== false;
 		} catch (\Exception $e) {
@@ -290,7 +287,7 @@ public function file_exists($path): bool {
 		}
 	}
 
-	public function unlink($path): bool {
+	public function unlink(string $path): bool {
 		try {
 			return $this->getConnection()->delete($this->absPath($path), true);
 		} catch (\Exception $e) {
@@ -298,7 +295,7 @@ public function unlink($path): bool {
 		}
 	}
 
-	public function fopen($path, $mode) {
+	public function fopen(string $path, string $mode) {
 		try {
 			$absPath = $this->absPath($path);
 			$connection = $this->getConnection();
@@ -339,7 +336,7 @@ public function fopen($path, $mode) {
 		return false;
 	}
 
-	public function touch($path, $mtime = null): bool {
+	public function touch(string $path, ?int $mtime = null): bool {
 		try {
 			if (!is_null($mtime)) {
 				return false;
@@ -356,15 +353,13 @@ public function touch($path, $mtime = null): bool {
 	}
 
 	/**
-	 * @param string $path
-	 * @param string $target
 	 * @throws \Exception
 	 */
-	public function getFile($path, $target): void {
+	public function getFile(string $path, string $target): void {
 		$this->getConnection()->get($path, $target);
 	}
 
-	public function rename($source, $target): bool {
+	public function rename(string $source, string $target): bool {
 		try {
 			if ($this->file_exists($target)) {
 				$this->unlink($target);
@@ -381,7 +376,7 @@ public function rename($source, $target): bool {
 	/**
 	 * @return array{mtime: int, size: int, ctime: int}|false
 	 */
-	public function stat($path): array|false {
+	public function stat(string $path): array|false {
 		try {
 			$stat = $this->getConnection()->stat($this->absPath($path));
 
@@ -398,10 +393,7 @@ public function stat($path): array|false {
 		}
 	}
 
-	/**
-	 * @param string $path
-	 */
-	public function constructUrl($path): string {
+	public function constructUrl(string $path): string {
 		// Do not pass the password here. We want to use the Net_SFTP object
 		// supplied via stream context or fail. We only supply username and
 		// hostname because this might show up in logs (they are not used).
@@ -409,7 +401,7 @@ public function constructUrl($path): string {
 		return $url;
 	}
 
-	public function file_put_contents($path, $data): int|float|false {
+	public function file_put_contents(string $path, mixed $data): int|float|false {
 		/** @psalm-suppress InternalMethod */
 		$result = $this->getConnection()->put($this->absPath($path), $data);
 		if ($result) {
@@ -441,7 +433,7 @@ public function writeStream(string $path, $stream, ?int $size = null): int {
 		}
 	}
 
-	public function copy($source, $target): bool {
+	public function copy(string $source, string $target): bool {
 		if ($this->is_dir($source) || $this->is_dir($target)) {
 			return parent::copy($source, $target);
 		} else {
@@ -468,7 +460,7 @@ public function copy($source, $target): bool {
 		}
 	}
 
-	public function getPermissions($path): int {
+	public function getPermissions(string $path): int {
 		$stat = $this->getConnection()->stat($this->absPath($path));
 		if (!$stat) {
 			return 0;
@@ -480,7 +472,7 @@ public function getPermissions($path): int {
 		}
 	}
 
-	public function getMetaData($path): ?array {
+	public function getMetaData(string $path): ?array {
 		$stat = $this->getConnection()->stat($this->absPath($path));
 		if (!$stat) {
 			return null;
diff --git a/apps/files_external/lib/Lib/Storage/SFTPReadStream.php b/apps/files_external/lib/Lib/Storage/SFTPReadStream.php
index e0b4b4002aad4..7dedbd7035a90 100644
--- a/apps/files_external/lib/Lib/Storage/SFTPReadStream.php
+++ b/apps/files_external/lib/Lib/Storage/SFTPReadStream.php
@@ -44,10 +44,9 @@ public static function register($protocol = 'sftpread') {
 	/**
 	 * Load the source from the stream context and return the context options
 	 *
-	 * @param string $name
 	 * @throws \BadMethodCallException
 	 */
-	protected function loadContext($name) {
+	protected function loadContext(string $name) {
 		$context = stream_context_get_options($this->context);
 		if (isset($context[$name])) {
 			$context = $context[$name];
@@ -146,7 +145,7 @@ public function stream_read($count) {
 		return $data;
 	}
 
-	private function request_chunk($size) {
+	private function request_chunk(int $size) {
 		if ($this->pendingRead) {
 			$this->sftp->_get_sftp_packet();
 		}
diff --git a/apps/files_external/lib/Lib/Storage/SFTPWriteStream.php b/apps/files_external/lib/Lib/Storage/SFTPWriteStream.php
index a652a83cb836c..d64e89b546217 100644
--- a/apps/files_external/lib/Lib/Storage/SFTPWriteStream.php
+++ b/apps/files_external/lib/Lib/Storage/SFTPWriteStream.php
@@ -42,10 +42,9 @@ public static function register($protocol = 'sftpwrite') {
 	/**
 	 * Load the source from the stream context and return the context options
 	 *
-	 * @param string $name
 	 * @throws \BadMethodCallException
 	 */
-	protected function loadContext($name) {
+	protected function loadContext(string $name) {
 		$context = stream_context_get_options($this->context);
 		if (isset($context[$name])) {
 			$context = $context[$name];
diff --git a/apps/files_external/lib/Lib/Storage/SMB.php b/apps/files_external/lib/Lib/Storage/SMB.php
index 4f1f51f1bf91f..0b72d62247f88 100644
--- a/apps/files_external/lib/Lib/Storage/SMB.php
+++ b/apps/files_external/lib/Lib/Storage/SMB.php
@@ -118,7 +118,7 @@ public function __construct($params) {
 		parent::__construct($params);
 	}
 
-	private function splitUser($user): array {
+	private function splitUser(string $user): array {
 		if (str_contains($user, '/')) {
 			return explode('/', $user, 2);
 		} elseif (str_contains($user, '\\')) {
@@ -135,14 +135,11 @@ public function getId(): string {
 		return 'smb::' . $this->server->getAuth()->getUsername() . '@' . $this->server->getHost() . '//' . $this->share->getName() . '/' . $this->root;
 	}
 
-	/**
-	 * @param string $path
-	 */
-	protected function buildPath($path): string {
+	protected function buildPath(string $path): string {
 		return Filesystem::normalizePath($this->root . '/' . $path, true, false, true);
 	}
 
-	protected function relativePath($fullPath): ?string {
+	protected function relativePath(string $fullPath): ?string {
 		if ($fullPath === $this->root) {
 			return '';
 		} elseif (substr($fullPath, 0, strlen($this->root)) === $this->root) {
@@ -153,12 +150,11 @@ protected function relativePath($fullPath): ?string {
 	}
 
 	/**
-	 * @param string $path
 	 * @throws StorageAuthException
 	 * @throws \OCP\Files\NotFoundException
 	 * @throws \OCP\Files\ForbiddenException
 	 */
-	protected function getFileInfo($path): IFileInfo {
+	protected function getFileInfo(string $path): IFileInfo {
 		try {
 			$path = $this->buildPath($path);
 			$cached = $this->statCache[$path] ?? null;
@@ -184,7 +180,6 @@ protected function getFileInfo($path): IFileInfo {
 	}
 
 	/**
-	 * @param \Exception $e
 	 * @throws StorageAuthException
 	 */
 	protected function throwUnavailable(\Exception $e): never {
@@ -194,8 +189,6 @@ protected function throwUnavailable(\Exception $e): never {
 
 	/**
 	 * get the acl from fileinfo that is relevant for the configured user
-	 *
-	 * @param IFileInfo $file
 	 */
 	private function getACL(IFileInfo $file): ?ACL {
 		$acls = $file->getAcls();
@@ -210,11 +203,10 @@ private function getACL(IFileInfo $file): ?ACL {
 	}
 
 	/**
-	 * @param string $path
 	 * @return \Generator<IFileInfo>
 	 * @throws StorageNotAvailableException
 	 */
-	protected function getFolderContents($path): iterable {
+	protected function getFolderContents(string $path): iterable {
 		try {
 			$path = ltrim($this->buildPath($path), '/');
 			try {
@@ -265,10 +257,7 @@ protected function getFolderContents($path): iterable {
 		}
 	}
 
-	/**
-	 * @param IFileInfo $info
-	 */
-	protected function formatInfo($info): array {
+	protected function formatInfo(IFileInfo $info): array {
 		$result = [
 			'size' => $info->getSize(),
 			'mtime' => $info->getMTime(),
@@ -287,7 +276,7 @@ protected function formatInfo($info): array {
 	 * @param string $source the old name of the path
 	 * @param string $target the new name of the path
 	 */
-	public function rename($source, $target, $retry = true): bool {
+	public function rename(string $source, string $target, bool $retry = true): bool {
 		if ($this->isRootDir($source) || $this->isRootDir($target)) {
 			return false;
 		}
@@ -326,7 +315,7 @@ public function rename($source, $target, $retry = true): bool {
 		return $result;
 	}
 
-	public function stat($path, $retry = true): array|false {
+	public function stat(string $path, bool $retry = true): array|false {
 		try {
 			$result = $this->formatInfo($this->getFileInfo($path));
 		} catch (\OCP\Files\ForbiddenException $e) {
@@ -368,10 +357,8 @@ private function shareMTime(): int {
 
 	/**
 	 * Check if the path is our root dir (not the smb one)
-	 *
-	 * @param string $path the path
 	 */
-	private function isRootDir($path): bool {
+	private function isRootDir(string $path): bool {
 		return $path === '' || $path === '/' || $path === '.';
 	}
 
@@ -382,10 +369,7 @@ private function remoteIsShare(): bool {
 		return $this->share->getName() && (!$this->root || $this->root === '/');
 	}
 
-	/**
-	 * @param string $path
-	 */
-	public function unlink($path): bool {
+	public function unlink(string $path): bool {
 		if ($this->isRootDir($path)) {
 			return false;
 		}
@@ -411,11 +395,8 @@ public function unlink($path): bool {
 
 	/**
 	 * check if a file or folder has been updated since $time
-	 *
-	 * @param string $path
-	 * @param int $time
 	 */
-	public function hasUpdated($path, $time): bool {
+	public function hasUpdated(string $path, int $time): bool {
 		if (!$path and $this->root === '/') {
 			// mtime doesn't work for shares, but giving the nature of the backend,
 			// doing a full update is still just fast enough
@@ -427,11 +408,9 @@ public function hasUpdated($path, $time): bool {
 	}
 
 	/**
-	 * @param string $path
-	 * @param string $mode
 	 * @return resource|false
 	 */
-	public function fopen($path, $mode) {
+	public function fopen(string $path, string $mode) {
 		$fullPath = $this->buildPath($path);
 		try {
 			switch ($mode) {
@@ -495,7 +474,7 @@ public function fopen($path, $mode) {
 		}
 	}
 
-	public function rmdir($path): bool {
+	public function rmdir(string $path): bool {
 		if ($this->isRootDir($path)) {
 			return false;
 		}
@@ -522,7 +501,7 @@ public function rmdir($path): bool {
 		}
 	}
 
-	public function touch($path, $mtime = null): bool {
+	public function touch(string $path, ?int $mtime = null): bool {
 		try {
 			if (!$this->file_exists($path)) {
 				$fh = $this->share->write($this->buildPath($path));
@@ -538,7 +517,7 @@ public function touch($path, $mtime = null): bool {
 		}
 	}
 
-	public function getMetaData($path): ?array {
+	public function getMetaData(string $path): ?array {
 		try {
 			$fileInfo = $this->getFileInfo($path);
 		} catch (\OCP\Files\NotFoundException $e) {
@@ -583,7 +562,7 @@ private function getMetaDataFromFileInfo(IFileInfo $fileInfo): array {
 		return $data;
 	}
 
-	public function opendir($path) {
+	public function opendir(string $path) {
 		try {
 			$files = $this->getFolderContents($path);
 		} catch (NotFoundException $e) {
@@ -598,7 +577,7 @@ public function opendir($path) {
 		return IteratorDirectory::wrap($names);
 	}
 
-	public function getDirectoryContent($directory): \Traversable {
+	public function getDirectoryContent(string $directory): \Traversable {
 		try {
 			$files = $this->getFolderContents($directory);
 			foreach ($files as $file) {
@@ -611,7 +590,7 @@ public function getDirectoryContent($directory): \Traversable {
 		}
 	}
 
-	public function filetype($path): string|false {
+	public function filetype(string $path): string|false {
 		try {
 			return $this->getFileInfo($path)->isDirectory() ? 'dir' : 'file';
 		} catch (\OCP\Files\NotFoundException $e) {
@@ -621,7 +600,7 @@ public function filetype($path): string|false {
 		}
 	}
 
-	public function mkdir($path): bool {
+	public function mkdir(string $path): bool {
 		$path = $this->buildPath($path);
 		try {
 			$this->share->mkdir($path);
@@ -634,7 +613,7 @@ public function mkdir($path): bool {
 		}
 	}
 
-	public function file_exists($path): bool {
+	public function file_exists(string $path): bool {
 		try {
 			// Case sensitive filesystem doesn't matter for root directory
 			if ($this->caseSensitive === false && $path !== '') {
@@ -658,7 +637,7 @@ public function file_exists($path): bool {
 		}
 	}
 
-	public function isReadable($path): bool {
+	public function isReadable(string $path): bool {
 		try {
 			$info = $this->getFileInfo($path);
 			return $this->showHidden || !$info->isHidden();
@@ -669,7 +648,7 @@ public function isReadable($path): bool {
 		}
 	}
 
-	public function isUpdatable($path): bool {
+	public function isUpdatable(string $path): bool {
 		try {
 			$info = $this->getFileInfo($path);
 			// following windows behaviour for read-only folders: they can be written into
@@ -682,7 +661,7 @@ public function isUpdatable($path): bool {
 		}
 	}
 
-	public function isDeletable($path): bool {
+	public function isDeletable(string $path): bool {
 		try {
 			$info = $this->getFileInfo($path);
 			return ($this->showHidden || !$info->isHidden()) && !$info->isReadOnly();
@@ -716,7 +695,7 @@ public function test(): bool {
 		}
 	}
 
-	public function listen($path, callable $callback): void {
+	public function listen(string $path, callable $callback): void {
 		$this->notify($path)->listen(function (IChange $change) use ($callback) {
 			if ($change instanceof IRenameChange) {
 				return $callback($change->getType(), $change->getPath(), $change->getTargetPath());
@@ -726,7 +705,7 @@ public function listen($path, callable $callback): void {
 		});
 	}
 
-	public function notify($path): SMBNotifyHandler {
+	public function notify(string $path): SMBNotifyHandler {
 		$path = '/' . ltrim($path, '/');
 		$shareNotifyHandler = $this->share->notify($this->buildPath($path));
 		return new SMBNotifyHandler($shareNotifyHandler, $this->root);
diff --git a/apps/files_external/lib/Lib/Storage/StreamWrapper.php b/apps/files_external/lib/Lib/Storage/StreamWrapper.php
index 96a306e4f53f7..8d90161323d9e 100644
--- a/apps/files_external/lib/Lib/Storage/StreamWrapper.php
+++ b/apps/files_external/lib/Lib/Storage/StreamWrapper.php
@@ -8,17 +8,13 @@
 
 abstract class StreamWrapper extends \OC\Files\Storage\Common {
 
-	/**
-	 * @param string $path
-	 * @return string|null
-	 */
-	abstract public function constructUrl($path): ?string;
+	abstract public function constructUrl(string $path): ?string;
 
-	public function mkdir($path): bool {
+	public function mkdir(string $path): bool {
 		return mkdir($this->constructUrl($path));
 	}
 
-	public function rmdir($path): bool {
+	public function rmdir(string $path): bool {
 		if ($this->is_dir($path) && $this->isDeletable($path)) {
 			$dh = $this->opendir($path);
 			if (!is_resource($dh)) {
@@ -40,19 +36,19 @@ public function rmdir($path): bool {
 		}
 	}
 
-	public function opendir($path) {
+	public function opendir(string $path) {
 		return opendir($this->constructUrl($path));
 	}
 
-	public function filetype($path): string|false {
+	public function filetype(string $path): string|false {
 		return @filetype($this->constructUrl($path));
 	}
 
-	public function file_exists($path): bool {
+	public function file_exists(string $path): bool {
 		return file_exists($this->constructUrl($path));
 	}
 
-	public function unlink($path): bool {
+	public function unlink(string $path): bool {
 		$url = $this->constructUrl($path);
 		$success = unlink($url);
 		// normally unlink() is supposed to do this implicitly,
@@ -61,11 +57,11 @@ public function unlink($path): bool {
 		return $success;
 	}
 
-	public function fopen($path, $mode) {
+	public function fopen(string $path, string $mode) {
 		return fopen($this->constructUrl($path), $mode);
 	}
 
-	public function touch($path, $mtime = null): bool {
+	public function touch(string $path, ?int $mtime = null): bool {
 		if ($this->file_exists($path)) {
 			if (is_null($mtime)) {
 				$fh = $this->fopen($path, 'a');
@@ -82,26 +78,19 @@ public function touch($path, $mtime = null): bool {
 		}
 	}
 
-	/**
-	 * @param string $path
-	 * @param string $target
-	 */
-	public function getFile($path, $target): bool {
+	public function getFile(string $path, string $target): bool {
 		return copy($this->constructUrl($path), $target);
 	}
 
-	/**
-	 * @param string $target
-	 */
-	public function uploadFile($path, $target): bool {
+	public function uploadFile(string $path, string $target): bool {
 		return copy($path, $this->constructUrl($target));
 	}
 
-	public function rename($source, $target): bool {
+	public function rename(string $source, string $target): bool {
 		return rename($this->constructUrl($source), $this->constructUrl($target));
 	}
 
-	public function stat($path): array|false {
+	public function stat(string $path): array|false {
 		return stat($this->constructUrl($path));
 	}
 }
diff --git a/apps/files_external/lib/Lib/Storage/Swift.php b/apps/files_external/lib/Lib/Storage/Swift.php
index 3582470b3be5e..0dd6e64bc65cb 100644
--- a/apps/files_external/lib/Lib/Storage/Swift.php
+++ b/apps/files_external/lib/Lib/Storage/Swift.php
@@ -70,20 +70,12 @@ private function normalizePath(string $path): string {
 
 	public const SUBCONTAINER_FILE = '.subcontainers';
 
-	/**
-	 * translate directory path to container name
-	 *
-	 * @param string $path
-	 * @return string
-	 */
-
 	/**
 	 * Fetches an object from the API.
 	 * If the object is cached already or a
 	 * failed "doesn't exist" response was cached,
 	 * that one will be returned.
 	 *
-	 * @param string $path
 	 * @return StorageObject|false object
 	 *                             or false if the object did not exist
 	 * @throws \OCP\Files\StorageAuthException
@@ -116,13 +108,11 @@ private function fetchObject(string $path): StorageObject|false {
 	/**
 	 * Returns whether the given path exists.
 	 *
-	 * @param string $path
-	 *
 	 * @return bool true if the object exist, false otherwise
 	 * @throws \OCP\Files\StorageAuthException
 	 * @throws \OCP\Files\StorageNotAvailableException
 	 */
-	private function doesObjectExist($path): bool {
+	private function doesObjectExist(string $path): bool {
 		return $this->fetchObject($path) !== false;
 	}
 
@@ -176,7 +166,7 @@ public function __construct($params) {
 		$this->mimeDetector = \OC::$server->get(IMimeTypeDetector::class);
 	}
 
-	public function mkdir($path): bool {
+	public function mkdir(string $path): bool {
 		$path = $this->normalizePath($path);
 
 		if ($this->is_dir($path)) {
@@ -207,7 +197,7 @@ public function mkdir($path): bool {
 		return true;
 	}
 
-	public function file_exists($path): bool {
+	public function file_exists(string $path): bool {
 		$path = $this->normalizePath($path);
 
 		if ($path !== '.' && $this->is_dir($path)) {
@@ -217,7 +207,7 @@ public function file_exists($path): bool {
 		return $this->doesObjectExist($path);
 	}
 
-	public function rmdir($path): bool {
+	public function rmdir(string $path): bool {
 		$path = $this->normalizePath($path);
 
 		if (!$this->is_dir($path) || !$this->isDeletable($path)) {
@@ -251,7 +241,7 @@ public function rmdir($path): bool {
 		return true;
 	}
 
-	public function opendir($path) {
+	public function opendir(string $path) {
 		$path = $this->normalizePath($path);
 
 		if ($path === '.') {
@@ -287,7 +277,7 @@ public function opendir($path) {
 		}
 	}
 
-	public function stat($path): array|false {
+	public function stat(string $path): array|false {
 		$path = $this->normalizePath($path);
 
 		if ($path === '.') {
@@ -327,7 +317,7 @@ public function stat($path): array|false {
 		return $stat;
 	}
 
-	public function filetype($path) {
+	public function filetype(string $path) {
 		$path = $this->normalizePath($path);
 
 		if ($path !== '.' && $this->doesObjectExist($path)) {
@@ -343,7 +333,7 @@ public function filetype($path) {
 		}
 	}
 
-	public function unlink($path): bool {
+	public function unlink(string $path): bool {
 		$path = $this->normalizePath($path);
 
 		if ($this->is_dir($path)) {
@@ -367,7 +357,7 @@ public function unlink($path): bool {
 		return true;
 	}
 
-	public function fopen($path, $mode) {
+	public function fopen(string $path, string $mode) {
 		$path = $this->normalizePath($path);
 
 		switch ($mode) {
@@ -417,7 +407,7 @@ public function fopen($path, $mode) {
 		}
 	}
 
-	public function touch($path, $mtime = null): bool {
+	public function touch(string $path, ?int $mtime = null): bool {
 		$path = $this->normalizePath($path);
 		if (is_null($mtime)) {
 			$mtime = time();
@@ -447,7 +437,7 @@ public function touch($path, $mtime = null): bool {
 		}
 	}
 
-	public function copy($source, $target): bool {
+	public function copy(string $source, string $target): bool {
 		$source = $this->normalizePath($source);
 		$target = $this->normalizePath($target);
 
@@ -508,7 +498,7 @@ public function copy($source, $target): bool {
 		return true;
 	}
 
-	public function rename($source, $target): bool {
+	public function rename(string $source, string $target): bool {
 		$source = $this->normalizePath($source);
 		$target = $this->normalizePath($target);
 
@@ -555,7 +545,7 @@ public function getContainer(): Container {
 		return $this->container;
 	}
 
-	public function writeBack($tmpFile, $path): void {
+	public function writeBack(string $tmpFile, string $path): void {
 		$fileData = fopen($tmpFile, 'r');
 		$this->objectStore->writeObject($path, $fileData, $this->mimeDetector->detectPath($path));
 		// invalidate target object to force repopulation on fetch
@@ -563,7 +553,7 @@ public function writeBack($tmpFile, $path): void {
 		unlink($tmpFile);
 	}
 
-	public function hasUpdated($path, $time): bool {
+	public function hasUpdated(string $path, int $time): bool {
 		if ($this->is_file($path)) {
 			return parent::hasUpdated($path, $time);
 		}