StarTech.com 3.5-Inch USB 2.0 to Dual SATA USB 2.0 External Hard Drive Enclosure with RAID SAT3520U2R (Black) Built-in support for numerous RAID modes for most personal/business needs and a 40mm cooling fan to keep drives from overheating Supports up to two high capacity 3.5" SATA drives over a single high speed USB 2.0 interface Backed by a StarTech.com 1 year warranty and free lifetime technical support Supports up to two 3.5" SATA hard drives High Speed USB 2.0 host interface, with supported transfer rates up to 480 Mbps Supported RAID modes: 0, 1, JBOD, BIG (span/concatenation) Activity and Error LED indicators for each drive, plus enclosure Power and Rebuild LED indicator 40mm cooling fan