The Western Digital WDBUPB0040JSL 4TB My Book Thunderbolt Duo is a dual-drive storage system with two Thunderbolt ports capable of up to 10 Gb/s data transfer rates. The system supports user-selectable RAID 0 and RAID 1 modes, as well as JBOD modes. Plus, since Thunderbolt ports are bidirectional, they afford high-speed multitasking. You can also daisy chain multiple devices or peripherals using the two Thunderbolt ports for better efficiency and productivity. For added convenience, the drives are user-serviceable and the system comes with the WD Drives Utilities software.

The WD My Book Thunderbolt Duo dual-drive storage system gives you the ideal combination of performance and capacity. And thanks to two Thunderbolt ports you get the superior data transfer speeds that only Thunderbolt technology can offer. Daisy-chain multiple devices through My Book Thunderbolt Duo and enjoy nearly unlimited flexibility and performance in your creative life.

Highlights

• Revolutionary Thunderbolt technology with two Thunderbolt ports for high-speed data transfer
• Dual-drive storage system with user-selectable RAID 0/1 that automatically duplicates your data
• Compatible with Time Machine
• User serviceable hard drives
• WD SmartWare automatic continuous backup software
• HFS formatted
• Daisy-chain multiple devices like HD monitors, video and audio editors and media players for nearly unlimited productivity
• Handle video editing, 3D rendering and other graphics-intensive projects simultaneously