Why does deleted data stay on a HDD once written, waiting to be overwritten, as opposed to being removed when requesting deletion?
In: 22
When you write something to a new drive, the data is written over that section of 0s. When deleting, it is faster to just tell the computer that it can write new data to that section without having to overwrite everything with 0s and start from a blank slate.
Instead of having to go through and ensure every bit of data is reverted to a 0, the computer just confirms new data when it is overwritten later on, making sure the 0s and 1s are where they should be.
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