The WD My Book Duo 20TB offers high speed, RAID disk space and great storage capacity for your videos, photos, music and documents. In RAID 0 mode, it achieves read speeds of up to 360 MB/s with USB 3.1 Gen 1 in two-way C type. RAID 1 configuration synchronizes data across both embedded drives, so all your content will be constantly backed up automatically. Although the drive supports USB-C interface, it is of course compatible with classic USB 3.1 Gen 1 and USB 2.0 (cable supplied). For connecting additional accessories, it also provides a USB 3.0 hub with 2 ports.