Samsung 870 EVO 500GB 2.5-inch SATA SSD, model MZ-77E500. Two ADDITIONAL individual drives are available in this listing; each purchase is for ONE 500GB drive. These are separate from the existing three-drive lot. The photo shows one of the two additional 500GB drives; the other is not pictured, and serial numbers vary. Used, minimally used by the seller, and working when last tested. Current SMART/endurance figures, power-on hours, and remaining lifespan are not available. A basic recognition check is planned before shipping; it is not a comprehensive health test.