This LaCie 100GB portable FireWire and USB 2.0 hard drive is designed by Porsche and serves as an ideal backup companion for your lonely PowerBook or MacBook Pro. (It also gets along with iBooks and MacBooks, but the metal styling doesn't match as well.)
Available sizes range from 60 to 160 GB and the drive is bus powered via the FireWire or USB port on your Mac laptop which solves the annoyance of having to plug in a separate power cable. Unlike some other tested drives, this one is able to draw enough power from even the pickiest Apple laptops which often provide no more current than the exact bus specification (which some drive manufacturers don't follow very carefully). In the unlikely case that your laptop doesn't provide enough bus power, this drive can even draw juice from both the FireWire and USB ports simultaneously via an included cable.
The drive is stylish, small, solidly built, fast, quiet, and works flawlessly with Macs. It comes with a soft drawstring case and thoughtfully short FireWire and USB cables. Note that you should use Disk Utility (in your Utilities folder) to reformat the drive as an HFS plus volume (Mac OS Extended) before using it for optimum Mac compatibility. If you need to exchange data with Windows users, leave it with the default format.