Buffalo's Drive Station Duo is a two 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 two high-performance optimized hard drives, Drive Station Duo is designed for continuous 24/7/365 operation with enhanced RAID performance. It supports RAID 0/1 flexible capacity or redundancy. With USB 3. 0 support and backward compatibility with USB 2. 0, Drive Station Duo works with almost any PC or Mac computer, or it can be connected to a storage server for fast office backup. Equipped with Nova BACKUP Business Essentials software, Drive Station Duo can back up any PC including Windows Servers and Exchange and SQL data stores. Plus, user replaceable hard drives offer easy maintenance with no tools required. Drive Station Duo features the redundancy and performance required for demanding professional and server applications.