Portable Hard Drive full review
As you’d expect, all the drives on test draw their power supply from your computer’s USB or FireWire port. Some laptop computers may not supply enough power through a single USB port, so most of the drives include a second USB cable in case you need to draw extra power from another USB port. Only Verbatim’s Portable Hard Drive FireWire/USB actually needed to use the second cable when attached to the USB ports on our MacBook.
Fortunately, it also has a FireWire 400 port that worked perfectly well, so that’s obviously the best option for Mac users (unless, of course, you have a MacBook Air with its solitary USB port, or one of the new MacBooks).