Where else does windows 10 store files?

pekimo said:

So it appears that opening excel files or opening browser has only added files to appdata local mainly. And also one file in roaming. What would you suggest for dealing with these types of files?"

I don't know where exactly Office stores those files but it's a safety feature when work in progress is saved at some (adjustable) intervals.I adjusted it to 5 minutes (from 10 minutes default), Wish all programs would do that.
Internet browsers also store cached content but that's a feature to speed up loading of the pages, another good feature.