I have a month old Macbook Pro 17" with the 256 SSD hard drive. And I am looking to clear some space on it, Finder tells me that I have only 50gb free and my applications seem to take up also only about 50gb of space. What could be taking up the rest? I only have a couple of games installed and the only large Applications are Ableton and the Adobe programs. How do I find out what else is taking up the rest of the HDD?