WD has expanded its My Book family of external hard drives to include a 2TB capacity, the largest capacity single-drive system currently available.

Developed to address the demand for higher storage capacities due to the increase of HD video cameras, digital photography and music downloads, the 2TB family is made up of four different models.

These are My Book Studio Edition and My Book Mac Edition, both formatted for Mac computers, and MyBook Home Edition and My Book Essential Edition, formatted for PC users.

The My Book Studio Edition comes with high speed FireWire 400/800 and eSATA interfaces as well as the popular USB 2.0 interface and a 5-year warranty, while its My Book Mac Edition sidekick keeps it simple with just a USB 2.0 interface and 1-year warranty.

Similarly, the My Book Home Edition features high-speed eSATA and FireWire 400 interfaces as well as USB 2.0, while My Book Essential Edition is more basic with just the USB 2.0 for transferring content to store.

All the 2TB My Book family features the "SmartPower" feature that turns the device on and off with the computer, as well as a SmartShutdown mode too, that will prevent the drive from being powered down until all the data has been written.

The My Book Studio Edition, My Book Home Edition and My Book Essential Edition drives are available now, with the My Book Mac Edition following behind in April. Prices will range from £242.99 to £279.99 depending on drive model.