DMR-E80h Problems

I’m having problems recording onto a DVD. Everytime I put in a DVD (I’m using a Sony DVD) it says the DVD is not compatible. I tried cleaning the area where you insert the DVD (pardon my lack of jargon. I know nothing about electronics.) but that didn’t do anything either. Is there anything else I can do? If there is, will you please explain it to me in very simple terms so that I can know what you are talking about? If there isn’t anything I can do then will I lose everything I have saved on the hard drive if I have to get a new one?

I would appreciate the help from some of you wonderfully knowledgable people out there!

Recordable Disc Type DVD-RAM, DVD-R

What type of Sony DVD disk are you using?