mc agent backup connectivity job tracker upgrade software error network drive certificate password folder selective sync webui local system local service windows installation license internet licensing multiple device local storage bootstrap bootstrap token expiration priority reset laptop desktop pre-existing folders .sync archive requirements destination system hardware encryption free vs home dns destination folder sync sync deleted files ntfs posix synchronization api permissions logs management console error high availability security communication mapped drive samba smb afp android port drive network update wan wan optimization group rename loading list of files ui endpoint delete service