public function getFilesList($strFolder, $storageName = '')
    {
        //build URI
        $strURI = $this->strURIFolder;
        //check whether file is set or not
        if (!$strFolder == '') {
            $strURI .= $strFolder;
        }
        if ($storageName != '') {
            $strURI .= '?storage=' . $storageName;
        }

        //sign URI
        $signedURI = Utils::sign($strURI);

        $responseStream = Utils::processCommand($signedURI, 'GET', '', '');

        $json = json_decode($responseStream);

        return $json->Files;
    }