This rack can be installed in 2 minutes in a 5.25 location "accessible on the front. It connects instantly (in 10 seconds) a record 5.25 "or 3.5" in the drawer supplied. Completed external boxes USB or eSATA, the disc mounts directly into the small removable tray provided with the rack. For backups, this is great. To recover data on a hard drive from another PC ... or simply to troubleshoot the hard disk of a friend who has recovered a virus or is about to give up the ghost, it's perfect. I recommend this purchase, excellent value for money, which met all my expectations.