HGST 7K750-500 HTS72550A9E364 500GB 7200RPM 16MB Cache SATA 3.0Gb/s 2.5" Internal Notebook Hard Drive - w/1 Year Warranty 500GB Capacity Rotation Speed: 7200RPM 16MB Buffer Size Interface: 2.5" SATA 3.0Gb/s Laptop Hard Drive Warranty: 1 Year Warranty from Reseller