2nd HDD SSD Hard Drive Caddy for Lenovo Thinkpad T420 T420i T510 T510i W510 T520 T520i W520 W700 W701 R400 R500 T430 T430i T530 T530i W530 Add a 2nd drive to your laptop by replacing your optical drive Fits in 12.7mm height Ultrabay of your ThinkPad laptop,Fully integrated into ThinkPad laptop, no cables/PSU/software driver needed This device accepts 2.5"/12.7mm-high or less SATA HDD/SSD. Compatible: T420 T420i T510 T510i W510 T520 T520i W520 W700 W701 R400 R500 T430 T430i T530 T530i W530