It's not the biggest portable hard drive OWC has to offer, but if speed is your top concern, you can now get a still impressive 320GB model from the company, which will spin at an always-desirable 7,200 rpm without the need for a pesky AC adapter. As with OWC's other Mercury-on-The-Go drives, you can also get this one in your choice of FireWire 800/400 + USB 2.0 Triple, FireWire 400 + USB 2.0 Combo, USB 2.0 + eSATA, or plain old USB 2.0 versions, each of which include a handy carrying case and the requisite backup software (for both Mac and Windows), and will set you back $280, $260, $258, and $240, respectively.

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