A Microsoft file hosting and synchronization service.
Hey Nikola,
thanks for the nice advise :) if I have no more space left and really need to do that I will turn off files on demand. The problem with this is for me that I have a very big folder structure and really need my directory tree as I need many files "on demand". and I hardly can plan which ones this will be as I have to look up some stuff when it comes up. But as there is perhaps no other possibility to fix this I think this is the best way to go.
Thanks again and have a nice day :)