Need more space to store your por... business related files while on the go? OWC has added a 500 GB model to their Mercury On-The-Go series of portable hard drives.

The unit offers a 5,400RPM, 8 MB cache drive complete with FireWire 800, FireWire 400, and USB 2.0 ports. In addition, the hard drive is also bundled with Prosoft DataBackup III for OS X and NovaStor NovaBackup for Windows.

The unit is already available and is going for US$ 359.99. That may seem like a lot of cash, but it's well worth the amount for people who need a large portable hard drive that they can carry in their pockets.