Yea, I had that, then I discovered on my own that if you go into your libraries and look for where your MAGIX folder is located (for mine it put it in the Program Files (x86)) then go into the MAGIX folder where the folder is (I have version 12, so mine says "Audio_Cleaning_Lab_12), that says "musiceditor" then open the Audio folder, then open the folder "Project Files", now probably you'll find a whole bunch of stuff in that folder it saves from whatever projects you've done (even if you click do not save when you get through saving your song, it still saves the info in this file), just select all then delete them (it doesn't delete your actual saved songs that you've finished and saved), that clears a lot of disc space there, I did one day after I was playing around and figured it out, turned out it came to being 3.94 GB's!!!!!