public static function  checkUploadPossibility($filesize) {
        $availableStorage = ClientServiceSettings::getAvailableStorage(Yii::app()->user->clientID);
        $usedStorage = Images::getUsedStorage(Yii::app()->user->clientID);

        if (($usedStorage + $filesize/(1024*1024*1024)) > $availableStorage) {
            return false;
        } else {
            return true;
        }
    }