QNAP TR-004 USB 3.0 RAID - 4 x HDD Supported - Serial ATA/600 Controller - RAID Supported 0, 1, 5, 10, JBOD - 4 x Total Bays - 4 x 3.5in Bay - 1 USB Port(s) - 1 USB 3.0 Port(s) - Desktop

Desktop form factor for your convenience and simplicity of usage Can hold 4 HDDs simultaneously Through RAID levels (0, 1, 5, 10, jbod), RAID provides data reliability, fault tolerance and improves overall performance DAS Storage System offers maximum storage productivity with added dependability