UEB 9.5mm Universal SATA 2nd HDD SSD Hard Drive Caddy Tray for MacBook Pro 13 15 17, Dell,Sony Laptop and more This 2nd Hard Disk Drive Caddy / Adapter will bring you new maximum data storage flexibility. With the second HDD in your Laptop, you can speed to backup important applications and critical data. Simply remove your optical driver and put the Caddy (with the added hard drive) in its place. This adapter accepts 2.5"/9.5mm SATA laptop HDD or SSD. Standard SATA 13 Pin optical drive interface. Easy to Use, Just Plug & Play, Fully integrated into Laptop, no cables needed. Thickness: 9.5mm Notice: Please make sure this caddy is compatible with your laptop before purchase. If you can not be sure of the compability, compatible laptop model listed as below