Okay, I've been wondering this for sometime now, and I feel like an idiot.. The CD's I buy say they're "700MB". However, I'm only able to burn about 670 MB to the disc before it tells me it's full. And if I click on my CD drive, and it shows the little pie chart of how much space is taken up, it says the max is 670 and not 700. So what is up with this? Does it have to do with my CD drive?