With hard drives you can remove the metal plate, usually small torx screws to reveal the shiny disc inside.. Scratch the surface with a screw driver or something, and throw in some sand/grit for good measure.. It’ll never work again.
Well technically some data might be recovered but the cost would be staggering so unless you are an international arms dealer or something it won’t be worth the effort to try to read the disk.
Or Ccleaner has a built in drive wipe facility that writes zeros and ones over the whole drive, multiple times which is considered a safe wipe.
Then just bin it.