• Green hard drives inside
  • Easy-access, user-replaceable drives


  • Rotational speed can vary to save power

At A Glance

Two-drive device comes configured for disk mirroring, to maximize value to those seeking redundant backup.

Manufacturer’s Description

Secure your vital data with WD's My Book Mirror Edition dual-drive storage system with RAID Mirroring. With RAID-based continuous data protection, automatic data backup software, and user-serviceability, this is the perfect backup system for your irreplaceable data.

Manufacturer’s Website

The Specs

Part Number WDH2U20000N
Drive size 2000.0 GB
Hard Drive Speed 7200.0 RPM
Ports and Connections
Available Interfaces USB 2.0
USB 2.0 Yes
Included Software
Included Software Automatic Backup
Buffer Size 16.0 MB
Installation Kit Hardware USB Cable


PC World Test Center
Interface tested USB 2.0
Primary Volume - Virus Scan 215.33
External Read - Files and Folders 128.25
External Read - Large File 109.21
Primary Volume - Windows File Search 111.81
External Write - Files and Folders 143.41
External Write - Large File 139.5
Test Version 2.0