I think I have everything for GarageBand but then I saw the 'restore sound library' in the file menu. 24 sounds and 1500 loops is already ticked and unselectable, but then it has 17 drummers and their kits, with a blue tick at 10GB, but that has already been downloaded and installed. I'm not sure what this means. Why is it still able to be unticked. It's very confusing especially as there are 18 drum kits anyway as well as 18 drummers. What does this mean.