OWC Mercury Elite Pro Dual 0GB USB 3.0 & Thunderbolt RAID 0/1/SPAN/Ind Drive Enclosure External RAID hard drive enclosure for Mac and PC Dual Interfaces: Thunderbolt x 2, USB 3.0 x 1 Houses up to two 3.5" SATA drives, up to 12TB total RAID options include RAID 0, RAID 1, Span, and Independent New, Quieter Operation. Includes 2 Year Warranty