Buffalo"s DriveStation Quad Hard Drive Array is a four hard drive, RAID enabled USB 3.0 storage solution for small servers, creative professionals, offices and consumers who need redundant and high performance external storage. Equipped with four hard drives, DriveStation Quad supports RAID 0, 1, 5, 10 for flexible capacity and redundant configurations or all drives can remain independent of one another. With USB 3.0 support and backward compatibility with USB 2.0, DriveStation Quad works with almost any PC or Mac computer and provides interface speeds up to 5 Gbps . Equipped with NovaBACKUP Business Essentials software, DriveStation Quad can back up any PC including Windows Servers and Exchange and SQL datastores. Plus, user replaceable hard drives offer easy maintenance with no tools required. DriveStation Quad features the redundancy and performance required for demanding professional and server applications.