Size Name:12.7mm WINGONEER Four-Channel SATA 2nd HDD HD Hard Drive Caddy Case for 12.7mm Universal Laptop CD / DVD-ROM Optical Bay Support 2.5" SATA I II III HDD SSD Description:The 2nd Hard Disk Drive Caddy / Adapter to bring you new maximum data storage flexibility, with the compact portable design. Which can work with 2.5" 12.7mm Serial ATA Hard drive HDD and SSD (Solid State Drive) as well. With the second HDD in your Laptop, You can speed to backup important applications and critical data ( Simply remove your CD-ROM drive and put the hard disk drive caddy (with the added hard drive) in its place.How to use:Unpack the New drive, lift the adapter retaining latch, the screw to the hard diskSelect the appropriate Channel for your LaptopInsert the drive into the Adapter at an angleSlide the drive into the connector until it locks into placeLower the adapter retaining latch until it snaps closedNote:Please check the below cool item, that will turn your original12.7mm sata connection drive into an external DVD drive, better yet, no AC adapter neededExternal case for 12.7mm Sata DVD drive. (Only a case, not included any drive)Packing Includes:1x Hard Disk Drive Caddy4x Screws