Expanding its lineup of external hard drives, Western Digital today announced that all models of its My Book dual-drive storage appliances are now available in capacities up to 2 TB (terabyte).

The new 2 TB capacity is now available on WD's My Book World Edition II, My Book Pro Edition II, My Book Premium Edition II models.

The system can be set by users to reserve half of its capacity to mirror users' data in real time using RAID technology - in this case, the RAID 1 setting.

The remote-access of WD's My Book World Edition II storage appliance offers users a simple and secure way to access and share data, photos, and music at home, in the office, and anywhere in the world - even when their local computer is off.

WD's My Book family of dual-drive storage appliances with up to 2 TB are available now at select retail stores, online retailers and in the United States directly from WD at www.shopwd.com. Estimated pricing for the My Book Dual-drive storage appliances with 2 TB capacity ranges from $749 USD to $799 USD depending upon model.