Western Digital My Book Duo 20TB External HDD RAID Key Features 20TB External HDD RAID 5400 rpm Rotation Speed Compatible with Windows and Mac USB 3.1 Interface 3-Year Limited Warranty Overview The My Book Duo drive has massive capacity for storing photos, videos, documents, and music. RAID-0 mode provides super-fast performance with up to 360MB/s sequential read speeds. Switch to RAID-1 configuration for redundancy and to mirror data on the WD drives inside. A USB Type-C port with all cables included makes it universally compatible (supports USB 3.1 Gen 1/3.0/2.0). Two USB 3.0 Type-A hub ports deliver flexibility for additional accessories. Box Contents WD My Book Duo RAID HDD USB-C to USB-C Cable USB-C to USB-A Cable AC Adapter Disk Replacement Tool WD Discovery Software Quick install guide Specifications Disk Type HDD RAID External? Yes Capacity 20TB Rotation Speed 5400 rpm Cache Transfer Rate up to 360MB/s Interface USB 3.0 Compatibility Windows and Mac Dimensions 180 x 160 x 100 mm