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

Imagine you have really bad ADHD.
You have all the things you use on display.
If you put something in the cupboard you will forget it exists.
You could also throw it in the trash but that will take longer.