WD G-DRIVE Thunderbolt 3 Ultra Reliable High performance, Premium Desktop Storage and fast back up. 6TB Silver NA. Interface (2x) Thunderbolt 3 ports, Operating Systems: macOS 10.12 plus Windows 10, 8.1 (via reformat). Thunderbolt 3 and USB 3.1 Gen 1 ports Daisy chaining for up to 5 additional devices , High-speed data transfers, Solid all-aluminum case makes for durability and stylish looks Fast, Enterprise-class 7200 RPM Ultrastar hard drive Apple Time Machine compatible , Plug-and-play with mac, 5-Year limited warranty. G-DRIVE with Thunderbolt 3 - An ultra-reliable, high performance storage solution featuring Thunderbolt 3 and USB 3.1 Gen 1 interfaces in an all-aluminum enclosure. The G-DRIVE desktop device is perfect for storage-intensive applications like audio/video editing or digital photography. With a high-capacity, enterprise-class Ultrastar hard drive inside, the G-DRIVE with Thunderbolt 3 device is plug and play on Mac, and easily reformatted for Windows.