Save plex media serveur

[tom80H]

Basically you’ll need the full Plex data directory (/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/).

You can use the support article on how to move to a new setup (knowing it’s not a 100% match… but it’ll cover all important steps).
https://support.plex.tv/articles/201370363-move-an-install-to-another-system/

There’s also a post in the tips & tricks section addressing how to backup/restore your PMS:

Linux Tips

Backup, Restore, or Clone your PMS installation Backing up your PMS data involves the same steps you’ll need if you were to clone your PMS and take to a new computer, reinstall the operating system, or just want a backup for safe keeping. Making the Backup (General Steps) Stop PMS Invoke the root shell Create the backup image Copy the image to the new system, perform your OS reinstallation, or whatever task you need Restoring a backup image (General Steps) (Re)install PMS itself if on a ne…