3 USB drives in a raid setup isn’t any less redundant than 3 SATA drives in the same setup (mathematically anyway, excluding potential bus problems which don’t

3 USB drives in a raid setup isn’t any less redundant than 3 SATA drives in the same setup (mathematically anyway, excluding potential bus problems which don’t really seem to be much of an issue these days). Personally I also have a node 304 based nas, but I’ve seen plenty of people with low cost Pi setups and no major issues. Plugging a few drives into a Pi is much easier if you don’t have experience with building computers, and is still a couple hundred dollars cheaper than something like that. Also worth noting that it’s possible to connect PCIe devices to a Pi, although I believe you need a specific model.