I've tested exactly the same configuration of a job backup in version 2.1.17 and in version 3.0.5 to a FTP host. In the older version the rotation happens correctly: the new file is transferred and the oldest file is deleted soon afterwards, like expected. However, in the 3.0.5 version, the new file is transferred, but the oldest could not be removed and the logs register: "ERROR: Can not delete "path/of/file" on FTP server!". I insist, the configuration of two jobs is excactly the same and the names of files have exactly the same structure. Any suggestion about?
To be more precise: same hosts, origin (separate installations) and destiny (FTP host), same user, same permissions.