Kingston 480GB SATA 3 2.5" SSD | $54 | Amazon
SSDs are to PCs what Red Bull is (allegedly) to humans. While we can’t exactly guarantee wings will sprout from your PC after installing one, we do know it’ll be one of the single biggest things you can do to improve system performance, and especially with this deal on a 480GB Kingston model, one of the cheapest. You can grab one for $54 after a 15% discount.
Mind you, this is a 2.5" SATA 3 model, which isn’t the newest available tech, but you’ll see remarkable improvements all the same if you’re coming from mechanical.