The My Book Duo drive has massive capacity ideal for storing photos, videos, documents and music. It’s super-fast with up to 360 MB/s2 sequential read speeds, thanks to WD Red drives inside and use of the USB Type-C port. That USB Type-C port with all cables included makes it universally compatible (supports USB 3.1 Gen 1/3.0/2.0). Two USB Type-A hub ports deliver flexibility for additional accessories. Compatibility: Formatted NTFS for Windows 10, Windows 7 or Windows Vista operating system. Requires reformatting for Mac OS X. Features: The My Book Duo drive has up to 20 TB capacity with a single cable Ready to perform at maximum speed and capacity in default mode, RAID-0; reconfigure the drive to RAID-1 for redundancy (data mirroring), or use it as two independent drives (JBOD) with the included WD drive utilities software The My Book duo drive comes with RAID-optimised WD Red drives inside to deliver high-speed, quality storage to rely on; RAID-optimised fir model : ADATA XPG SX6000 Lite 512GB PCIe 3D NAND PCIe Internal Solid State Drive tag : External Hard Drives