The RTX 220-3QR hard drive enclosure brings ease of use and flexibility to portable RAID storage. The state-of-the-art hardware RAID controller built into the RTX 220-3QR offers RAID 1 (stripe) and RAID 0 (mirror) configuration options. If youre going to carry RTX 220-3QR wherever you go, rest assured it will connect to most computers. With four different connection options (USB 2.0, USB 3.0, FireWire 800, and eSATA), youll be ready for whatever you encounter and will be able to transfer data at speeds of 150+ MB/s (depending on drives and connection type). TrayFreeTM bays make adding or swapping drives effortless. Its as easy as opening the door, sliding the drive in, and closing the door. No screws, no trays. It just works.