Western Digital has announced a new personal cloud storage system that combines shared storage and remote access with backup technology.

My Book Live Duo continuously maintains a second copy of all files for real-time data backup. Half the capacity is used to store users' data and half is used for a second copy. In the event that one drive fails, data is protected because it's duplicated on the other drive.

The storage device is compatible with PC and Mac using software that enables mirrored or automatic backups. In spanning mode the two-drive systems acts like a RAID (redundant array of independent discs) unit, combining both drives into one large volume for maximum storage capacity. To deliver the performance needed for today's most demanding applications, the device uses a 800 MHz CPU and claims to deliver reading speeds faster than USB 2.0.

My Book Live Duo connects to home networks to create shared storage that users can access at home or anywhere in the world through secure remote access on computers, tablets and smartphones.

In addition, the device's built-in media server streams film, photos and music to any DLNA-certified multimedia device, such as Blu-ray players, PlayStation 3, Xbox 360 and smart TVs.

"My Book Live Duo is really the ideal, all-in-one storage and entertainment solution for today's ultra-connected consumer," said Chris Bull, director of marketing for Western Digital's Connected Home Solutions group.

"The ability for consumers to safely backup all their digital content, as well as access and share content from anywhere in the world on their tablet, smartphone or any computer, truly provides a unique and rewarding experience for anyone who wants to enjoy, and needs to protect, valuable digital content."

My Book Live Duo is available now in a 4TB (£499.90) and 6TB (£499.90) versions.