RTIVHX535 RAID Tower IV (black color) with 1 5X1 HPM-XA Enclosure Version installed. Install up to five 3.5" SATA hard drives of any capacity (drives not included). 4 Drives can be installed onto drive tray that can be added or removed like tape cartridge from each drive bay, the last drive can be added or removed like tape cartridge from the drive bay with no special tool required. Connect to system via USB 2.0 or eSATA port (connecting cables included). Drives can be configured as RAID0, RAID1, RAID3, RAID5, RAID10, JBOD, Clone Mode using built-in hardware RAID. RAID setting via software utility under Windows only. OS independent, can be used on any system.