WD My Book Duo

From £160/$260 www.westerndigital.com

The WD My Book Duo external HD is our pick for the best desktop storage device for photographers who have large amounts of photos to store – while also ensuring that those shots are safe. It comes with a 4TB-36TB of storage space, and it can handle two drives, which can be set up in RAID 1, so your photos are automatically backed up on a second HD. It also comes with 256-bit AES hardware encryption, and automatic backup software and dual USB 3.0 ports. PROS Huge amounts of space; RAID support CONS High capacity variants get very expensive