[useful] automated backup of raspberry pi
I came across this today. I haven't tried it but this info needs to be lodged in the forum for the future questions. Hopefully people can post their experiences with this system in this thread.
https://raspibackup.linux-tips-and-tricks.de/en/home/
"Install and configure your backup with raspiBackup in 5 minutes. Create a new backup every week and use the grandfather, father and son (GFS) backup rotation scheme to manage your backup versions."