diff --git a/app/Services/Storage.php b/app/Services/Storage.php
new file mode 100644
index 00000000..aad521f8
--- /dev/null
+++ b/app/Services/Storage.php
@@ -0,0 +1,165 @@
+<?php
+
+namespace App\Services;
+
+class Storage
+{
+    /**
+     * Read a file and return bin data
+     *
+     * @param  string $filename
+     * @return string|bool
+     */
+    public static function get($filename)
+    {
+        $result = file_get_contents($filename, 'r');
+        if (false === $result) {
+            throw new \Exception("Failed to read $filename.");
+        }
+        return $result;
+    }
+
+    public static function put($filename, $data)
+    {
+        return file_put_contents($filename, $data);
+    }
+
+    public static function exists($filename)
+    {
+        return file_exists($filename);
+    }
+
+    public static function hash($filename, $type = 'sha256')
+    {
+        return hash_file('sha256', $filename);
+    }
+
+    public static function rename($fname, $new_fname)
+    {
+        if (false === rename($fname, $new_fname)) {
+            throw new \Exception("Failed to rename $fname to $new_fname.");
+        }
+        return $new_fname;
+    }
+
+    public static function size($filename)
+    {
+        if (self::exists($filename)) {
+            return filesize($filename);
+        } else {
+            return 0;
+        }
+    }
+
+    /**
+     * Remove a file
+     *
+     * @param  $filename
+     * @return $bool
+     */
+    public static function remove($filename)
+    {
+        if (self::exists($filename)) {
+            return unlink($filename);
+        }
+    }
+
+    public static function removeDir($dir)
+    {
+        $resource = opendir($dir);
+        $size = 0;
+        while($filename = @readdir($resource)) {
+            if ($filename != "." && $filename != "..") {
+                $path = $dir.$filename;
+                if (is_dir($path)) {
+                    // recursion
+                    self::removeDir($path."/");
+                } else {
+                    unlink($path);
+                }
+            }
+        }
+        closedir($resource);
+
+        return rmdir($dir);
+    }
+
+    /**
+     * Recursively count the size of specified directory
+     *
+     * @param  string $dir
+     * @return int, total size in bytes
+     */
+    public static function getDirSize($dir)
+    {
+        $resource = opendir($dir);
+        $size = 0;
+        while($filename = @readdir($resource)) {
+            if ($filename != "." && $filename != "..") {
+                $path = $dir.$filename;
+                if (is_dir($path)) {
+                    // recursion
+                    $size += self::getDirSize($path);
+                } else if (is_file($path)) {
+                    $size += filesize($path);
+                }
+            }
+        }
+        closedir($resource);
+        return $size;
+    }
+
+    /**
+     * Recursively count files of specified directory
+     *
+     * @param  string $dir
+     * @param  $file_num
+     * @return int, total size in bytes
+     */
+    public static function getFileNum($dir, $file_num = 0)
+    {
+        $resource = opendir($dir);
+        while($filename = readdir($resource)) {
+            if ($filename != "." && $filename != "..") {
+                $path = $dir.$filename;
+                if (is_dir($path)) {
+                    // recursion
+                    $file_num = self::getFileNum($path, $file_num);
+                } else {
+                    $file_num++;
+                }
+            }
+        }
+        closedir($resource);
+        return $file_num;
+    }
+
+    /**
+     * Copy directory recursively
+     *
+     * @param  string $source
+     * @param  string $dest
+     * @return bool
+     */
+    public static function copyDir($source, $dest)
+    {
+        if(!is_dir($source))
+            return false;
+        if(!is_dir($dest))
+            mkdir($dest, 0777, true);
+
+        $handle = dir($source);
+
+        while($entry = $handle->read()) {
+            if ($entry != "." && $entry != "..") {
+                if (is_dir($source.'/'.$entry)) {
+                    // recursion
+                    self::copyDir($source.'/'.$entry, $dest.'/'.$entry);
+                } else {
+                    @copy($source.'/'.$entry, $dest.'/'.$entry);
+                }
+            }
+        }
+        return true;
+    }
+}
diff --git a/app/Services/Updater.php b/app/Services/Updater.php
index 34a5a713..e9872dd1 100644
--- a/app/Services/Updater.php
+++ b/app/Services/Updater.php
@@ -2,7 +2,6 @@
 
 namespace App\Services;
 
-use Blessing\Storage;
 use Option;
 
 class Updater