Western Digital is now shipping its first external hard drive with Thunderbolt technology - the My Book Thunderbolt Duo dual-drive storage system.

My Book Thunderbolt Duo is an all-in-one external drive for professionals, enthusiasts, and consumers who own vast amounts of digital content including videos, music, and photos. The drive serves as a safe way to backup content stored on your computer while providing the fastest way to get information to and from the WD drive. In addition, its RAID 1 support allows users to create a second copy of their digital content on the drive for double-safe protection. The drive also supports a JBOD mode (allocate each disk individually to a specific task) option for users running Windows OS on a Mac.

Additional features found on the My Book Thunderbolt Duo include out-of-the-box compatibility with Mac OS Time Machine and formatting for HFS + Journaled for Mac; capability for multi-stream workflows; and a 3-year limited warranty.

The My Book Thunderbolt Duo is available now starting at $599.99 USD MSRP (4 TB) and $699.99 (6 TB).