The WiebeTech RTx110-3Q 3.5" SATA, USB 3.0 and eSATA External Enclosure features tray free bays that can handle 20,000+ drive insertions. This means you can treat Hard Drives the way you used to think about floppy disks: Pop one out, pop another in. The popular RTx100 now includes a fast USB 3.0 interface, dual FireWire 800 and an eSATA port. It also supports USB 2.0 via the USB 3.0 port. These tray free bays are a breeze to add a drive to. It really is as easy as opening the door, sliding the drive in and closing the door. No screws, no trays, it just works.