by Adam Armstrong

WD Releases 20TB External Desktop Storage

Today Western Digital Corporation (WDC) launched what it is calling the world’s highest capacity external desktop storage system, the updated My Book Duo. With upwards of 20TB of capacity, the new My Book Duo can give both consumers and most professionals the storage they need for their ever-expanding digital content libraries. The new RAID storage system offers enough room to back up photos, videos, music, work, and important documents while providing fast transfer speeds.

The My Book Duo comes in several capacities 20TB, 16TB, 12TB, 8TB, 6TB and 4TB making it good for everything from home users backing up mobile devices and multimedia files to small businesses backing up important files. The My Book Duo comes with RAID-optimized WD Red HDDs that can hit up to 360 MB/s sequential reads. The drives also come with RAID-optimized firmware that is ideal for two-disk array systems with auto management of drive operations to help ensure read/write cycle data integrity.

The device comes with a USB-C and two USB-A (supports USB 3.1 Gen 1/3.0/2.0) ports, meaning that it is compatible with modern devices leveraging the new interface as well as several existing technologies that still use the USB-A ports including drones, action cameras, card readers, keyboards, mice, USB drives or phone syncing and charging. From a security standpoint, the My Book Duo comes with password protection and 256-bit AES hardware encryption with WD Security software built in.


  • Capacity: 4TB | 6TB | 8TB | 12TB | 16TB | 20TB
  • Interface:
    • USB 3.1 Gen 1 Type-C up to 10GB/s
    • USB 3.0 Type-A up to 5GB/s
    • Power Supply (DC in)
  • System compatibility:
    • Windows 10, Windows 8.1 or Windows 7 operating systems
    • macOS Sierra (10.12), El Capitan (10.11), Yosemite (10.10), or Mavericks (10.9) operating systems (reformatting required)
  • Temperature
    • Operating: 5°C to 35°C
    • Non-operating: -20°C to 65°C
  • Dimensions
    • HxWxL: 180 x 100 x 160 mm (7.09 x 3.94 x 6.3 in)
    • Weight: 2.29 kg (5.05 lbs) | 2.34 kg (5.16 lbs) | 2.35 kg (5.18 lbs) | 2.52 kg (5.56 lbs) | 2.36 kg (5.20 lbs) | 2.38 kg (5.25 lbs)
  • Warranty: 3-year limited

Availability and Pricing

The WD My Book Duo storage system comes with a 3-year limited warranty and is available now with a MSRP of $799.99 (20TB), $599.99 (16TB), $419.99 (12TB), $329.99 (8TB), $289.99 (6TB) and $259.99 (4TB).

WD My Book Duo

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