Moin
All user data are in a separate user partition and linked into users home. These user data are backed up with grsync. Only modified data are saved, without versioning.
Systems are backed up from a second system on the same machine or with a ventoy stick with persistence by usb boot. Partclone is used to save and restore system partitions. To reduce disk space partclone is sent through gzip via a pipe or vice versa.
Regards dsat