So I have this second 1 tb ssd that I got from someone and the thing is that it is better than my primary one that has windows. I've been using it for a while as secondary storage but I have decided that I want to clone my OS onto it because it would benefit from faster speeds, but now I tried to use clean on disk part and it gives me error "clean is not allowed in the disk containing the current boot.. etc" and this is odd because I have never installed anything only games. I have deleted all the games for the clone only like 2, but it still has 20 gb used on it and I don't know why please help.