Never buy refurbished computer parts, ever, especially internal necessities. You have no possible way of knowing if they work until you get them installed, and no way of knowing if they may die tomorrow if they do work. Refurbished items are almost always sold "as is" with no return policy, so if something goes wrong you are screwed. This listing seems on the up and up, but you just don't know. Save your money unless the drive you have right now is literally dead or making the death throe noises every time you boot up.