I need to backup my entire library, so I can transfer it over to my new system. I’ve tried copying over the Media and Metadata folders, but my library directories are not included. This has tons of important custom tags and info I have set up.
What else do I need to bring over from my old system where I can just restore everything exactly as it is on my new system so it’s 1:1 copy (without having to reconfigure everything)?
Besides your media files, you need to move the Plex Data Folder to the new system.
There are some additional steps, such as disabling emptying of trash, before the move. These are important if your media files will be in a different location on the new system.