This is really weird and I have no idea what could be causing it, but space on my hard drive has just been slowly vanishing over a long period of time. After all the applications I use and have on my MacBook now were installed, I had over 30GB free. That was several months ago. Now I have just over 10GB free with nothing since being downloaded or installed. When editing videos, I just keep all footage/project files on my external hard-drive. If I ever have files ACTUALLY stored on my MacBook itself, I will always delete them after the whole project is done and exported, then empty the trash. At first it's just not very noticeable, because space just disappears so slowly... But I've been through every folder, checked everywhere, and there is NOTHING on my MacBook that I didn't have on it when it had over 30GB free. How is this happening? I'm scared that down the road it'll just go down to nothing. And it's not because of updates either, because I've kept track of all updates I've made on all applications and the total amount of space taken from updates hasn't even been 1GB. So how is 20GB just gone!? PLEASE HELP! This is driving me crazy!