Lots of people have mentioned rsynx, restic, borgbackup, and others, but which would be best for backing up nextcloud, immich, and radicale? Do all of them have a method of automatically backing up every X days/weeks? Why use one over the other, what are the differences?
I do monthly backups with cron and tar and syncthing for my containers.
I do quarterly backups of my server (14TB) to external USB HDDs. This is done via a script that mounts the drives, runs rsync to copy, then unmounts the drives again and emails me when it is done. I dont bother encrypting them as it ia mainly just media.