Help deciding how to properly use NAS

[TheDreadPirate]

Right off the bat, I strongly discourage getting a Synology, or similar, NAS to run Jellyfin. Pretty much none of them have a CPUs/iGPUs capable of handling more than a couple 1080P streams. And just barely. And they are not really upgrade-able so they are very limiting in the long term.

If you want a Synology NAS to simply be your storage, that is another story. Go for it.

Personally, my server is also my NAS. It is a custom built PC with parts picked for the intended usage of running Jellyfin and other services. If you have the know-how, this is the route I would suggest.

BUT, if your spare PC is literally doing little to nothing right now, the specs you've stated are perfectly capable of running Jellyfin easily. Put in a bunch of hard drives, configure the OS to make them available over the network, and now it is also a NAS.