I think you're having a unit problem. Just an OS install takes at least a few gigabytes, and even SD video (at decent quality) is going to be around 1GB/hour. A

I think you're having a unit problem. Just an OS install takes at least a few gigabytes, and even SD video (at decent quality) is going to be around 1GB/hour. An HD movie will easily be 4-6GB. And if you've got, say, Xcode installed, there goes a few GB, too. Common Adobe media applications are over a GB these days. Even VMware Fusion is more than half a gig.