I am near the end of an extensive editing project in FCS 2, and I am having problems with the system hanging up constantly. I have 8gb of ram (the max for my machine), and my main internal drive is a 250 gb HD. I'm wondering if I can backup & delete files from my main drive to free up space and hopefully improve performance, and if it will cause any problems. I plan to backup the Soundtrack Pro Loops to an external drive, which will free up about 21gb of space. Is there anything else that's safe to do this with (if this process is safe, that is.)? Can I also backup the "Previous systems" folder & delete it from my main drive? Thanks in advance!