So I was cleaning out my computer as I was selling it and I then ran ccleaner on it. I was using the drive wiper to clean up free space. I ran the option to clean free space with 3 passes
The scan's progress went up to 80% and I was running short on time and had to give my computer away.
My question is that if the scan only went up to 80% does that mean the free space wasn't cleaned fully or had the free space been ran through at least once already since I was doing 3 passes.
How does it work? does an advanced overwrite go through the system deleting all the free space until about 33% then do another pass in this sequence or does it run through each file 3 times then goes onto the next?
Basically, I just want to know if my system's free space had been cleared and passed through at least once like a simple overwrite (one pass).