For clean Installing:
How to do a clean install
https://answers.microsoft.com/en-us/insider/for...
https://answers.microsoft.com/en-us/windows/for...
For changing the location of user folders:
https://www.dummies.com/computers/operating-sys...
For changing the Program Files directory:
https://www.thewindowsclub.com/change-default-p...
Do note that doing the steps above would make Feature update to fail to install which also isn't possible if you use a 32GB device.
Disclaimer:
There are links to non-Microsoft websites which would provide accurate and safe information. Watch out for ads on the websites which are frequently classified as a PUP (Potentially Unwanted Products). There is no need to buy paid products to fix your computers as they do more harm than good sometimes.