Western Digital has added two new models to its 3.5in external hard drive line-up. The WD My Book World Edition comes in 1TB and 2TB variants and offers remote access via any browser as well as being a NAS (network-attached storage) device.

The silver-clad NAS drive is the first product Western Digital has launched that includes its recently announced CaviarGreen 2TB low power-consumption drive.

The Western Digital My Book World Edition is a uPnP device that offers automatic, continuous backup, obviating the need for the user to schedule backups at the end of each day or to initiate a manual backup.

Western Digital research suggests that while 70 percent of US consumers say they regularly back up or archive the content of their PC, most do so in a haphazard way, often to a variety of media such as CD or DVD or to USB drives.

"With a My Book World Edition drive, it just takes a few simple steps for a family to automatically back up all the computers in their home and keep the backup continuously up to date.

"Media streaming and remote access add fun and flexibility to the mix making My Book World Edition a great choice for today's digital home", said WD's senior vice-president Jim Welsh.

As well as being able to stream content to a console such as an Xbox 360, the WD drive can be used for media management and can act as an iTunes server via its support for Bonjour.

WD will sell the 1TB version for £169 and the 2TB version for £369. Both work on Macs as well as Windows PCs.

Western Digital 2TB My Book World Edition