I was making a backup of one of my DVDs, only to find that I couldn't because of insufficient storage capacity. PC World advise me that a single sided DVD has a 4.7Gb capacity, yet my original DVD has files totalling 6.7Gb. Can anybody explain how this is possible on a single sided DVD?
'Real' DVDs have two layers. These can be thought of two sides. Typically you can store 4.7GB per layer/side. Oftentimes you experience the layer switch when watching a DVD. There might be a slight pause.
Anyway, consumer-wise there aren't any dual-layer DVD writer/rewriters yet but they should be here soon.
In the mean time, you can use a thing called DVD Shrink to back-up the movie portion only (no extras).
Must go an fill in a purchase authorisation form with the wife. I'm sure I only saw these in the news a while ago. But then, maybe that was a high-speed version.