Increase the productivity of your ThinkPad laptop system with the ThinkPad 9.5mm SATA Hard Drive Bay Adapter IV. This adapter enables serial ATA hard drive expansion in a ThinkPad with a native 9.5 serial media bay. With a second hard drive, you can quickly store and back up critical data.ThinkPad 9.5mm SATA Hard Drive Bay Adapter IV delivers maximum storage flexibility.