We are trying to use a Synology DiskStation running an SFTP server as the storage back end for RingCentral Archiver. It's not going well. Often times call recordings are listed as having failed to archive even after multiple retries. I can't get RingCentral to give us any kind of more specific error logging to try to determine the cause.
What SFTP servers are you all using, and how good is the reliability?