<ul><li>Hard Drive Caddy Compatible: 2.5"/12.7 mm SATA HDD or SSD, Hard drive NOT included / Laptops that have a 12.7mm-thick / high optical bay with the SATA interface Product Description: This universal SATA Optical Bay Hard Drive Adapter lets you add a second hard drive to the laptop systems. With a second hard drive, you can quickly store and back up critical data. - Add this caddy to your laptop to give you another hard drive. Simply remove your CD/DVD-ROM drive and put the Caddy (with the added hard drive) in its place... This is a good working adapter. - Note: Please check the below cool item, that will turn your 12.7mm SATA connection drive into an external DVD drive, better yet, no AC adapter needed; External case for 12.7mm SATA DVD drive. Only a case, not included any drive) - Support Plug &amp; Play; Fast &amp; Reliable connection just as the primary HDD. Fully integrated into Laptop, no cables / PSU / software driver needed. Dual boot, Support installation of 2nd Operating System on the 2nd HDD and boot selection. Package Content: 1x 2nd HDD Caddy, 4x Hard Drive Screws and 1pcs screw driver.</li></ul>