The CRU RTX410-3SJ JBOD tower offers high performance, multiple interface options and supports four 3.5" SATA hard drives. TrayFree bays make adding or changing drives effortless. It's as easy as opening the door, sliding the drive in, and closing the door. No screws, no trays, it just works. RTX410-3SJ includes multiple host interfaces with eSATA and USB 3.0 ports.