hey I found a useful command line tool that will make your windows 10 OS smaller and run a bit faster. note this only is for windows 10 that is all.
if you run a command prompt in administrator mode and type:
It will compress your OS binaries and free up a few gigs of space. and the command:
will uncompress your OS to the way it was before. so if you are running on small storeage devices you may want to make sure your windows 10 OS is compacted.