Dear Lifehacker, I really would like to replace my old computer with a new one, but the one I want doesn’t support USB 3.0. I don’t want to buy a machine that’s already somewhat outdated. If my next machine only has USB 2.0 ports, will it be incompatible with USB 3.0 external hard drives and accessories a few years down the line? Is USB 3.0 so important that I should wait until it’s available in a computer I want, or should I just buy what’s available now? Thanks, USB Confused