I just deleted tons of stuff to try to free up hard drive space. I removed huge galleries in iPhoto, all my movie projects in iMovie, half of my torrents and cleaned out my download folder. I deleted enough to assume my content would only require half my hard drive space. And it turns out, I was right. So why do I only have 15 gigabyte of free space left? And what is the 70+ "Other" data occupying my hard drive? I have looked through my folders and I just dont understand what it is.