This Drobo external drive array is the perfect storage solution for both PC and Mac users. With four bays and support for HDD drives, this black device has a massive storage capacity of 6TB and features FireWire and USB combo interfaces. Additionally, the drive array has FireWire ports, removable drives, indication lights, and auto power on/off features. The product line is from Drobo and it is compatible with 3.5-inch form factors. Plus Extra 2TB for Spare! Plus Firewire 400 / Thunderbolt 2 Adapter!