@EricxDu It's a bit expensive, close to $500. Which isn't so bad for a computer, but seems expensive for a mini-computer maybe. I had a hard time figuring out whatever else might be reasonably free software compatible and decided, "you know what? the thinkpenguin people do a good job, and this looks better than fretting over trying to figure out how to reduce the price and never setting up my backup machine again."