[Vendome]

Demil by writing over at least 7 times.

My empty space get written over 7 times for general space saving and prepping for defrag.

Erase 32 times for totally cleaning the drive.

If I am letting an old computer go to the bone pile I erase 32 times and take a sander to each side of each disk and bang em hard with a hammer then I toss the leftover pieces in various garbage bins, nowhere near my home or business.

[Paladin2]

Can’t be too safe. What about some time in a degaussing field of varying strength?

[Grizzled Bear]

...bang em hard with a hammer then I toss the leftover pieces in various garbage bins, nowhere near my home or business.

For some reason portions of your comment reminded me of a certain legendary FReeper...