I have the paid OD, and think I know what I'm doing, and still got burned on occasions, luckily with little consequence due to other mechanisms in place. But when I really didn't want to deal with OD's crap, I went all nuclear on it. Uninstall. When MS insisted to reinstall it, I replaced the executable and went for file system permissions. I twisted them so hard that even MS couldn't (or at least didn't try to) overwrite my fake OD executable.
I stopped running Windows wherever I can not because the tools or OS are that bad but because a machine should come with sane defaults but should respect my wishes if I want to go against those default. When it starts to override me, it's not my machine anymore and whoever "owns" it (MS in this case) can shove it.
Either give me unlimited space or get out of my file system. They could have just made it a separate thing and let me put stuff in there if I wanted to, instead of hijacking my file system and just messing it up.