Add four 3.5" SATA III hard drives to your Mac or PC through Thunderbolt and build an external RAID array for accelerated performance or secure data redundancy - Compatible with Thunderbolt Enabled computer systems such as MacBook Pro and 3.5in Hard Drives - Thunderbolt RAID / Thunderbolt Hard Drive Enclosure / RAID Enclosure / RAID Enclosure - Build an External RAID array with Thunderbolt Interface for accelerated performance in high bandwidth applications