Jellyfin, the open source media server, has released their 6th RC for version 10.11.0.
This is a preview release, intended for those interested in testing 10.11.0 before it’s final public release.
If you intend to test this, BE SURE you stop your Jellyfin server and take a full backup before upgrading!
WIP release notes here for now: https://notes.jellyfin.org/v10.11.0_features
See the GitHub link for more details and a full list of changes.
So when a full backup is recommended, does that include media files, or is it just the cache(?) and jellyfin database?
Backup of the jellyfin cache, Configs and database.
Your media should be outside of all that.
Exactly where those things are depends on your exact install method (native/docker/Linux/windows).
https://jellyfin.org/docs/general/administration/backup-and-restore/