Hard drive - internal, Capacity 500 GB, FF 2.5", Interface SATA 6Gb/s, Drive Transfer Rate 600 MBps (external), Spindle Speed 7200 rpm, Compatible Bay 2.5". The ThinkPad 500GB 7200rpm 7mm 2.5” hard drive with the high speed SATA 6Gbps interface, 7mm height, it is the best solution to upgrade your ThinkPad systems.