Western Digital introduced the My Passport Wireless 2TB drive in response to a perceived increase in demand for high capacity wireless storage devices. Seagate with its 2TB Wireless Plus drive and LaCie (a Seagate subsidiary) with the Fuel 2TB launched on the market months earlier.Of the three, Western Digital is the most expensive, selling for just under £196 (around $300, AU$375) on Amazon compared to £150 (around $230, AU$285) for the Seagate model and a smidgen over £164 (around $255, AU$310) for the LaCie drive.To put these figures in context, a bog standard 2TB USB 3.0 hard disk drive like the Toshiba Canvio Basics costs less than £67 (around $105, AU$130), about a third of the price of the My Passport Wireless. How to justify such a massive price difference? Well, wireless hard disk drives are not just storage devices.