I made a clear cover for a hard drive so you can see what's going on inside notice the actuator arm moving trying to read data the data is on the spinning platter of which I'm about to put stuff on this is how you properly wipe a hard drive we'll start with a small screw oops let's try again this time we'll use some copper balls as they spin around the platter data is being removed copper reacts with aluminium allowing the data to be easily lifted from the spinning platters next we'll put a needle to the important data sections notice how it grinds away the personal files last let's use some sand the grains of sand help to remove any remaining data on the hard drive be sure to hit like And subscribe for more of this insanity