Why does deleted data stay on a HDD once written, waiting to be overwritten, as opposed to being removed when requesting deletion?

Question

Why does deleted data stay on a HDD once written, waiting to be overwritten, as opposed to being removed when requesting deletion?

In: 22

Answer 1

It’s easier to delete the ‘address’ of the code then deleting the code itself. It’s just an extra step to delete the first set. So it’ll reassign the address after a while to something else and just write over the old info.