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 use borg (borgmatic) to back up home server to home nas. The only major disadvantage of borg is that it requires running borg also on the receiving end, so it doesn’t work with a lot of cloud storage providers like S3.
Restic can work with most everything as a backup target.