So you’re upgrading your computer or replacing the hard drive and you want to be sure that the information on the old drive is no longer readable. Just delete the files or format the drive right? Nope. Still readable by bad people.
The only way to ensure the drive is no longer readable is to destroy the actual disk, and the best way to do that is to….
drill a hole through it.
In fact, drill several holes through it for good measure.