Totally broken?

so, I messed up, I reformatted wrong drive and have lost my whole server, good thing my media is on NAS, but now when I installed plex server on new build pc it shows no media and i cannot figure out how to add any media. when I click on + media it tells me to download media server which I have done.

I just keep going in circles. please help?

Did you delete the old server from your account and claim the new one?

Start here: New Claiming Requirement for Windows