I’m a big fan of separating my storage from my compute. I have plex running on one computer, and all the storage for it on a separate one. This allows you to have a lower powered NAS and just serves up files, and a higher spec’d (or smaller) computer for running Plex/Jellyfin.

I have a buddy who uses a mini PC with quicksync to serve up Plex to a few family members, and pulls everything from a larger NAS box running TrueNAS full of disks.