The 4-Bay Drobo Robotic Storage Array Enclosure is an innovative external storage solution. The Drobo features the convenience and data protection capabilities of a RAID, without the hassles and inflexibility associated with RAID storage. The enclosure supports up to four standard 3.5" SATA hard drives.
You can configure the storage capacity of the Drobo to suit your needs; you'll even be able to mix and match drive capacities without sacrificing data protection. Your computer sees the Drobo as a single hard drive volume for the ultimate in ease of use.