def syncdown(self, remotedir = '', localdir = '', deletelocal = False):
		''' Usage: syncdown [remotedir] [localdir] [deletelocal] - \
sync down from the remote directory to the local directory
  remotedir - the remote directory at Baidu Yun (after app's directory) to sync from. \
if not specified, it defaults to the root directory
  localdir - the local directory to sync to if not specified, it defaults to the current directory.
  deletelocal - delete local files that are not inside Baidu Yun directory, default is False
		'''
		result = const.ENoError
		rpath = get_pcs_path(remotedir)
		compare_result = self.__compare(rpath, localdir, False)
		same, diff, local, remote = compare_result
		if Pool and self.processes > 1:
			subresult = self.__syncdown_multi(rpath, localdir, compare_result)
			if subresult != const.ENoError:
				result = subresult
		else:
			subresult = self.__syncdown_single(rpath, localdir, compare_result)
			if subresult != const.ENoError:
				result = subresult
		if str2bool(deletelocal):
			subresult = self.__syncdown_delete_local(localdir, local)
			if subresult != const.ENoError:
				result = subresult

		if result == const.ENoError:
			self.__remove_remote_on_success(rpath)
		return result
Usage: syncdown [remotedir] [localdir] [deletelocal] - \
sync down from the remote directory to the local directory
  remotedir - the remote directory at Baidu Yun (after app's directory) to sync from. \
if not specified, it defaults to the root directory
  localdir - the local directory to sync to if not specified, it defaults to the current directory.
  deletelocal - delete local files that are not inside Baidu Yun directory, default is False