Hard drive maker Western Digital clearly hopes to appeal to more literate computer users with its latest external hard disk: between 160GB and 500GB of back-up space and media storage capacity dubbed My Book that “sits naturally on desktops and bookshelves”, according to the company. WD is offering two versions of My Book. There’s a Premium Edition that incorporates a USB 2.0 port and a pair of Firewire 400 connectors. Don’t want to pay for the Firewire ports? Then the USB-only Essential Edition’s for you. You won’t get the Premium-only back-up software, though.