i have a lifetime plex pass, but I’d consider moving to jellyfin when their closed-captioning support reaches parity with plex. i regularly spin up a jellyfin container to try it out, but i still run into issues. And jellyfin’s android apps are mediocre (in particular android auto support), especially for music compared to plexamp
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.