Backup file on FTP

Hello, I’m actually searching for a option that permit to automatically backup files from our FTP server -> NAS Synology (or the opposite if is easier) when a file is newer.

There is a way to upload a file only when it’s newer than the one which is on the FTP server (or on the Synology) ?

Thanks!

Sounds like you’re looking for syncing software. I think that would work better in the situation you’re describing. Sync Software