def cdl_addmon(self, source_url, save_path = '/', timeout = 3600):
        ''' Usage: cdl_addmon <source_url> [save_path] [timeout] - add an offline (cloud) download task and monitor the download progress
  source_url - the URL to download file from.
  save_path - path on PCS to save file to. default is to save to root directory '/'.
  timeout - timeout in seconds. default is 3600 seconds.