Developed for professionals looking for high storage capacity and performance, the LaCie 2big USB 3.0 is the first RAID storage solution to feature the new SuperSpeed USB 3.0 interface, and supports multiple uncompressed HD streams. With three RAID modes for flexibility, you can choose "Fast" (RAID 0) for full performance and get speeds of up to 306MB/s, "Safe" (RAID 1) for full data protection, or JBOD for full capacity. With its 7200 rpm drives and compatibility with USB 2.0, the LaCie 2big USB 3.0 is the most complete USB 3.0 storage device. It's Time Machine compatible, and it's even USB 3.0-compatible on Mac computers, thanks to LaCie's exclusive USB 3.0 driver. The unique aluminum heat sink design is sturdy and features 60% more surface area, providing the most efficient heat dissipation.