Over time, most Mac users end up with an old hard drive or two, usually from a Mac or PC they replaced. It could also be a drive that was replaced because it was acting flaky.
Courtesy of Apple
This may seem like a strange idea, but there's a good chance that an old hard drive, even one that was teetering at death's door, may still be usable for some type of storage duty with your Mac.
In this guide, we will show you how to Revive a Hard Drive for Use With Your Mac.