Question Factory reset PC but 750 GB is still taken up on my HDD and i cant seem to remove anything

Feb 11, 2020
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750GB is taken up still after factory reset and when i go into uninstall programs none of the games show up
Even going into the games files I cant see mto uninstall anyhting as most of them are just random files

I cant figure out how to post pictures in here so sorry its just me badly explaining