Tar works for small things, but over an arbitrary file number file size combo it becomes unwieldy. Rsync, rbackup, rsnapshot, are great tools based on rsync, an

Tar works for small things, but over an arbitrary file number file size combo it becomes unwieldy. Rsync, rbackup, rsnapshot, are great tools based on rsync, and these days Borg has been getting a lot of traction. Bacula is great but complicated to setup and manage. There is a newer very interesting one called Ur that seems promising... And my mind is blanking on some of the others, I'll comment when I'm not mobile so I can look at my list. Also don't forget zfs/btrfs functions that might be relevant.