[S0M3GUY]

whats the fastest way to format a hard drive?
whats the most efficient way to format a hard drive?

[EliteTM]

I just use the default Windows formatting option, when reinstall an operating system. Since it's already there and its just more convenient. If you're going to be selling the computer or parting it out, I'd completely wipe it with DBAN.

[ｋａ＄ｈ]

There are heaps of programs that can do this, or just go to disk management (if your on windows), right click your hard drive and click format