The ThinkPad 1 TB 5,400 RPM 6 Gb/s 2.5" SATA Hard Drive option provides a robust thin design, allowing you to seamlessly upgrade from the primary hard drive of supported ThinkPad laptops. This affordable option provides good storage size along with advanced format and SATA data transfer capabilities. For additional storage and backups, install this drive as a second hard drive using the ThinkPad 9.5 mm SATA Hard Drive Bay Adapter IV (0B47315).