diff --git a/apps/files/ajax/delete.php b/apps/files/ajax/delete.php
index 293543c547..575b8c8d9e 100644
--- a/apps/files/ajax/delete.php
+++ b/apps/files/ajax/delete.php
@@ -14,27 +14,18 @@ $files = json_decode($files);
 $filesWithError = '';
 $success = true;
 //Now delete
-foreach($files as $file) {
-	if( !OC_Files::delete( $dir, $file )) {
+foreach ($files as $file) {
+	if (!OC_Files::delete($dir, $file)) {
 		$filesWithError .= $file . "\n";
 		$success = false;
 	}
 }
 
-// updated max file size after upload
-$l=new OC_L10N('files');
-$maxUploadFilesize=OCP\Util::maxUploadFilesize($dir);
-$maxHumanFilesize=OCP\Util::humanFileSize($maxUploadFilesize);
-$maxHumanFilesize=$l->t('Upload') . ' max. '.$maxHumanFilesize;
+// get array with updated storage stats (e.g. max file size) after upload
+$storageStats = \OCA\files\lib\Helper::buildFileStorageStatistics($dir);
 
-if($success) {
-	OCP\JSON::success(array("data" => array( "dir" => $dir, "files" => $files,
-		'uploadMaxFilesize'=>$maxUploadFilesize,
-		'maxHumanFilesize'=>$maxHumanFilesize
-	)));
+if ($success) {
+	OCP\JSON::success(array("data" => array_merge(array("dir" => $dir, "files" => $files), $storageStats)));
 } else {
-	OCP\JSON::error(array("data" => array( "message" => "Could not delete:\n" . $filesWithError,
-		'uploadMaxFilesize'=>$maxUploadFilesize,
-		'maxHumanFilesize'=>$maxHumanFilesize
-	)));
+	OCP\JSON::error(array("data" => array_merge(array("message" => "Could not delete:\n" . $filesWithError), $storageStats)));
 }
diff --git a/apps/files/ajax/getstoragestats.php b/apps/files/ajax/getstoragestats.php
index e55e346ed6..7a2b642a9b 100644
--- a/apps/files/ajax/getstoragestats.php
+++ b/apps/files/ajax/getstoragestats.php
@@ -5,12 +5,5 @@ $RUNTIME_APPTYPES = array('filesystem');
 
 OCP\JSON::checkLoggedIn();
 
-$l=new OC_L10N('files');
-$maxUploadFilesize = OCP\Util::maxUploadFilesize($dir);
-$maxHumanFilesize = OCP\Util::humanFileSize($maxUploadFilesize);
-$maxHumanFilesize = $l->t('Upload') . ' max. ' . $maxHumanFilesize;
-
 // send back json
-OCP\JSON::success(array('data' => array('uploadMaxFilesize' => $maxUploadFilesize,
-										'maxHumanFilesize'  => $maxHumanFilesize
-)));
+OCP\JSON::success(array('data' => \OCA\files\lib\Helper::buildFileStorageStatistics('/')));
diff --git a/apps/files/ajax/upload.php b/apps/files/ajax/upload.php
index 8f0084e2bc..415524be62 100644
--- a/apps/files/ajax/upload.php
+++ b/apps/files/ajax/upload.php
@@ -8,90 +8,73 @@ OCP\JSON::setContentTypeHeader('text/plain');
 
 OCP\JSON::checkLoggedIn();
 OCP\JSON::callCheck();
-$l=OC_L10N::get('files');
+$l = OC_L10N::get('files');
 
-// current max upload size
-$l=new OC_L10N('files');
-$maxUploadFilesize=OCP\Util::maxUploadFilesize($dir);
-$maxHumanFilesize=OCP\Util::humanFileSize($maxUploadFilesize);
-$maxHumanFilesize=$l->t('Upload') . ' max. '.$maxHumanFilesize;
+// get array with current storage stats (e.g. max file size)
+$storageStats = \OCA\files\lib\Helper::buildFileStorageStatistics($dir);
 
 if (!isset($_FILES['files'])) {
-	OCP\JSON::error(array('data' => array( 'message' => $l->t( 'No file was uploaded. Unknown error' ),
-		'uploadMaxFilesize'=>$maxUploadFilesize,
-		'maxHumanFilesize'=>$maxHumanFilesize
-	)));
+	OCP\JSON::error(array('data' => array_merge(array('message' => $l->t('No file was uploaded. Unknown error')), $storageStats)));
 	exit();
 }
 
 foreach ($_FILES['files']['error'] as $error) {
 	if ($error != 0) {
 		$errors = array(
-			UPLOAD_ERR_OK=>$l->t('There is no error, the file uploaded with success'),
-			UPLOAD_ERR_INI_SIZE=>$l->t('The uploaded file exceeds the upload_max_filesize directive in php.ini: ')
-										.ini_get('upload_max_filesize'),
-			UPLOAD_ERR_FORM_SIZE=>$l->t('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified'
-										.' in the HTML form'),
-			UPLOAD_ERR_PARTIAL=>$l->t('The uploaded file was only partially uploaded'),
-			UPLOAD_ERR_NO_FILE=>$l->t('No file was uploaded'),
-			UPLOAD_ERR_NO_TMP_DIR=>$l->t('Missing a temporary folder'),
-			UPLOAD_ERR_CANT_WRITE=>$l->t('Failed to write to disk'),
+			UPLOAD_ERR_OK         => $l->t('There is no error, the file uploaded with success'),
+			UPLOAD_ERR_INI_SIZE   => $l->t('The uploaded file exceeds the upload_max_filesize directive in php.ini: ')
+				. ini_get('upload_max_filesize'),
+			UPLOAD_ERR_FORM_SIZE  => $l->t('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified'
+				. ' in the HTML form'),
+			UPLOAD_ERR_PARTIAL    => $l->t('The uploaded file was only partially uploaded'),
+			UPLOAD_ERR_NO_FILE    => $l->t('No file was uploaded'),
+			UPLOAD_ERR_NO_TMP_DIR => $l->t('Missing a temporary folder'),
+			UPLOAD_ERR_CANT_WRITE => $l->t('Failed to write to disk'),
 		);
-		OCP\JSON::error(array('data' => array( 'message' => $errors[$error],
-			'uploadMaxFilesize'=>$maxUploadFilesize,
-			'maxHumanFilesize'=>$maxHumanFilesize
-		)));
+		OCP\JSON::error(array('data' => array_merge(array('message' => $errors[$error]), $storageStats)));
 		exit();
 	}
 }
-$files=$_FILES['files'];
+$files = $_FILES['files'];
 
 $dir = $_POST['dir'];
-$error='';
+$error = '';
 
-$totalSize=0;
-foreach($files['size'] as $size) {
-	$totalSize+=$size;
+$totalSize = 0;
+foreach ($files['size'] as $size) {
+	$totalSize += $size;
 }
-if($totalSize>OC_Filesystem::free_space($dir)) {
-	OCP\JSON::error(array('data' => array( 'message' => $l->t( 'Not enough storage available' ),
-		'uploadMaxFilesize'=>$maxUploadFilesize,
-		'maxHumanFilesize'=>$maxHumanFilesize)));
+if ($totalSize > OC_Filesystem::free_space($dir)) {
+	OCP\JSON::error(array('data' => array_merge(array('message' => $l->t('Not enough storage available')), $storageStats)));
 	exit();
 }
 
-$result=array();
-if(strpos($dir, '..') === false) {
-	$fileCount=count($files['name']);
-	for($i=0;$i<$fileCount;$i++) {
+$result = array();
+if (strpos($dir, '..') === false) {
+	$fileCount = count($files['name']);
+	for ($i = 0; $i < $fileCount; $i++) {
 		$target = OCP\Files::buildNotExistingFileName(stripslashes($dir), $files['name'][$i]);
 		// $path needs to be normalized - this failed within drag'n'drop upload to a sub-folder
 		$target = OC_Filesystem::normalizePath($target);
-		if(is_uploaded_file($files['tmp_name'][$i]) and OC_Filesystem::fromTmpFile($files['tmp_name'][$i], $target)) {
+		if (is_uploaded_file($files['tmp_name'][$i]) and OC_Filesystem::fromTmpFile($files['tmp_name'][$i], $target)) {
 			$meta = OC_FileCache::get($target);
 			$id = OC_FileCache::getId($target);
-			// updated max file size after upload
-			$maxUploadFilesize=OCP\Util::maxUploadFilesize($dir);
-			$maxHumanFilesize=OCP\Util::humanFileSize($maxUploadFilesize);
-			$maxHumanFilesize=$l->t('Upload') . ' max. '.$maxHumanFilesize;
 
-			$result[]=array( 'status' => 'success',
-				'mime'=>$meta['mimetype'],
-				'size'=>$meta['size'],
-				'id'=>$id,
-				'name'=>basename($target),
-				'uploadMaxFilesize'=>$maxUploadFilesize,
-				'maxHumanFilesize'=>$maxHumanFilesize
+			// updated max file size after upload
+			$storageStats = \OCA\files\lib\Helper::buildFileStorageStatistics($dir);
+
+			$result[] = array_merge(array('status' => 'success',
+										  'mime'   => $meta['mimetype'],
+										  'size'   => $meta['size'],
+										  'id'     => $id,
+										  'name'   => basename($target)), $storageStats
 			);
 		}
 	}
 	OCP\JSON::encodedPrint($result);
 	exit();
 } else {
-	$error=$l->t( 'Invalid directory.' );
+	$error = $l->t('Invalid directory.');
 }
 
-OCP\JSON::error(array('data' => array('message' => $error,
-	'uploadMaxFilesize'=>$maxUploadFilesize,
-	'maxHumanFilesize'=>$maxHumanFilesize
-)));
+OCP\JSON::error(array('data' => array_merge(array('message' => $error), $storageStats)));
diff --git a/apps/files/lib/helper.php b/apps/files/lib/helper.php
new file mode 100644
index 0000000000..f2b1f142e9
--- /dev/null
+++ b/apps/files/lib/helper.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace OCA\files\lib;
+
+class Helper
+{
+	public static function buildFileStorageStatistics($dir) {
+		$l = new \OC_L10N('files');
+		$maxUploadFilesize = \OCP\Util::maxUploadFilesize($dir);
+		$maxHumanFilesize = \OCP\Util::humanFileSize($maxUploadFilesize);
+		$maxHumanFilesize = $l->t('Upload') . ' max. ' . $maxHumanFilesize;
+
+		// information about storage capacities
+		$storageInfo = \OC_Helper::getStorageInfo();
+
+		return array('uploadMaxFilesize' => $maxUploadFilesize,
+					 'maxHumanFilesize'  => $maxHumanFilesize,
+					 'usedSpacePercent'  => (int)$storageInfo['relative']);
+	}
+}