Right now my home server consists of a thinkcentre tiny and a single 6tb usb3 external drive.

The goal is to eventually build out a nas, but that’s not in my budget at the moment.

Is there some kind of external device I can put multiple 3.5inch drives, has plenty of bandwidth for said drives, and routes through either usb3 or C and can potentially allow me to have a raid (or raid similar) setup for redundancy for the data?