WD 20TB My Book Duo Desktop RAID External Hard Drive - USB 3.1 - WDBFBE0200JBK-N. Orders that exceed listed availability will automatically be voided without notice. 7.09" x 3.94" x 6.30. This listing is currently undergoing maintenance, we apologise for any inconvenience caused.The item "WD 20TB My Book Duo Desktop RAID External Hard Drive USB 3.1 WDBFBE0200JBK-N" is in sale since Friday, September 22, 2017. This item is in the category "Computers/Tablets & Networking\Drives, Storage & Blank Media\Hard Drives (HDD, SSD & NAS)\External Hard Disk Drives". The seller is "newegg" and is located in United States. This item can be shipped to United States.