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?
ZFS. Since it backs up at block level, moving giant files means you onoy send a few K for the backup, unlike other solutions like
rsync, etc.