OCZ Enyo

The OCZ Enyo is expensive as portable storage devices go – the 128GB model we tested costs nearly £240.

Two things account for the cost: it uses fast flash memory for storage and it has a USB 3 connection to the computer.

The latter gives it the fastest possible connection. The USB 3 hard disks we have looked at were speedy, but this device is even quicker, because of its flash memory.

The Enyo itself is the shape of an elongated credit card, less than 1cm thick and light. It has a small connector at one end, into which plugs the supplied cable.

This has a different shape to USB 2 connectors, though the other end, which plugs into the computer, is the same old USB shape. It works fine when plugged into a USB 2 port, but you don't get the high speeds.

If you have a USB 3 drive OCZ predicts a ten-fold speed increase, but in our tests it increased between two- and five-fold when we switched from USB 2 to USB 3, which is still an impressive boost.

The main problem is price. For most people the increase in price simply is not worthwhile even with the speed boost. We recommend waiting for prices to drop.