I am trying to copy my Nav disc so I have a back-up just in case something was to happen to it. DO I need a special DVD or something. When I went to Burn it, it was 7.4 Gb my normal blank DVD's are only 4.7Gb ?

Anbody have any ideas.

Thanks

You need a dual layer DVD. And of course your DVD burner has to be able to burn dual layer DVD's.

You may have to try different media's until you find one that works for you.Try Verbatims first.