1. Ultra bay SATA 2nd Hold Lenovo ThinkPad T420 12.7mm 2. This caddy is 12.7mm thick, it will not leave a gap. 3. This device accepts 2.5"/9.5mm SATA Hard Disk Drive
1. IBM Lenovo Thinkpad R400 R500 T420 T510 2. Thickness:12.7 mm 3. Interface:SATA TO SATA
1, Unpack the hard drive, Lift the hard drive caddy retaining latch, Th Screws to the hard drive. 2, Insert the hard drive into the hard drive caddy. 3, Slide the hard drive into the connector until it locks into place. 4, Lower the hard drive caddy retaining latch until it snaps closed.