I deleted my Windows file and I don't have a backup if I reinstall the windows 10 will defile comeback up

[Microsoft Windows]

I wanted to reinstall window 10 but I'm having lack of space issue so I was wondering if I delete some window file or if I delete my window file and reinstall the Windows 10 will those file come back up because I do not have a backup and I try using a USB is still not working I don't know what to do anymore

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