To format a hard drive before you start using it in Windows, use the Disk Management utility; on a Mac, use Disk Utility.

I'm trying to reformat my hard drive (only have one) and it won't let me b/c the os is on the hard drive. I tried creating a start-up disk with Windows XP so that I could boot to DOS and format from a ...

With over a decade of experience at Which?, Tom covers everything from tech advice to money-saving tips and highlights the best deals during major sales events. When your external hard drive fails to ...