diff --git a/apps/files_trashbin/lib/trashbin.php b/apps/files_trashbin/lib/trashbin.php
index d492810b95f05febbb2fdb340942c72ace1a6608..676252e1634e062a72e9b2c10859ec1310eddc3a 100644
--- a/apps/files_trashbin/lib/trashbin.php
+++ b/apps/files_trashbin/lib/trashbin.php
@@ -214,13 +214,13 @@ class Trashbin {
 		/** @var \OC\Files\Storage\Storage $sourceStorage */
 		list($sourceStorage, $sourceInternalPath) = $ownerView->resolvePath('/files/' . $ownerPath);
 		try {
-			$sizeOfAddedFiles = $sourceStorage->filesize($sourceInternalPath);
+			$moveSuccessful = true;
 			if ($trashStorage->file_exists($trashInternalPath)) {
 				$trashStorage->unlink($trashInternalPath);
 			}
 			$trashStorage->moveFromStorage($sourceStorage, $sourceInternalPath, $trashInternalPath);
 		} catch (\OCA\Files_Trashbin\Exceptions\CopyRecursiveException $e) {
-			$sizeOfAddedFiles = false;
+			$moveSuccessful = false;
 			if ($trashStorage->file_exists($trashInternalPath)) {
 				$trashStorage->unlink($trashInternalPath);
 			}
@@ -234,7 +234,7 @@ class Trashbin {
 
 		$trashStorage->getUpdater()->renameFromStorage($sourceStorage, $sourceInternalPath, $trashInternalPath);
 
-		if ($sizeOfAddedFiles !== false) {
+		if ($moveSuccessful) {
 			$query = \OC_DB::prepare("INSERT INTO `*PREFIX*files_trash` (`id`,`timestamp`,`location`,`user`) VALUES (?,?,?,?)");
 			$result = $query->execute(array($filename, $timestamp, $location, $owner));
 			if (!$result) {
@@ -258,7 +258,7 @@ class Trashbin {
 			self::scheduleExpire($owner);
 		}
 
-		return ($sizeOfAddedFiles === false) ? false : true;
+		return $moveSuccessful;
 	}
 
 	/**
@@ -268,18 +268,14 @@ class Trashbin {
 	 * @param string $owner owner user id
 	 * @param string $ownerPath path relative to the owner's home storage
 	 * @param integer $timestamp when the file was deleted
-	 *
-	 * @return int size of stored versions
 	 */
 	private static function retainVersions($filename, $owner, $ownerPath, $timestamp) {
-		$size = 0;
 		if (\OCP\App::isEnabled('files_versions') && !empty($ownerPath)) {
 
 			$user = \OCP\User::getUser();
 			$rootView = new \OC\Files\View('/');
 
 			if ($rootView->is_dir($owner . '/files_versions/' . $ownerPath)) {
-				$size += self::calculateSize(new \OC\Files\View('/' . $owner . '/files_versions/' . $ownerPath));
 				if ($owner !== $user) {
 					self::copy_recursive($owner . '/files_versions/' . $ownerPath, $owner . '/files_trashbin/versions/' . basename($ownerPath) . '.d' . $timestamp, $rootView);
 				}
@@ -287,7 +283,6 @@ class Trashbin {
 			} else if ($versions = \OCA\Files_Versions\Storage::getVersions($owner, $ownerPath)) {
 
 				foreach ($versions as $v) {
-					$size += $rootView->filesize($owner . '/files_versions/' . $v['path'] . '.v' . $v['version']);
 					if ($owner !== $user) {
 						self::copy($rootView, $owner . '/files_versions' . $v['path'] . '.v' . $v['version'], $owner . '/files_trashbin/versions/' . $v['name'] . '.v' . $v['version'] . '.d' . $timestamp);
 					}
@@ -295,8 +290,6 @@ class Trashbin {
 				}
 			}
 		}
-
-		return $size;
 	}
 
 	/**
@@ -633,18 +626,16 @@ class Trashbin {
 	public static function expire($user) {
 		$trashBinSize = self::getTrashbinSize($user);
 		$availableSpace = self::calculateFreeSpace($trashBinSize, $user);
-		$size = 0;
 
 		$dirContent = Helper::getTrashFiles('/', $user, 'mtime');
 
 		// delete all files older then $retention_obligation
 		list($delSize, $count) = self::deleteExpiredFiles($dirContent, $user);
 
-		$size += $delSize;
-		$availableSpace += $size;
+		$availableSpace += $delSize;
 
 		// delete files from trash until we meet the trash bin size limit again
-		$size += self::deleteFiles(array_slice($dirContent, $count), $user, $availableSpace);
+		self::deleteFiles(array_slice($dirContent, $count), $user, $availableSpace);
 	}
 
 	/**