Can't burn DVDs with NEC ND3100AD. Please Help!



I’m able to burn cd-r discs, but no dvd+r. I can’t find any updated firmware, and I’ve tried with several programs. I also tried uninstalling and reinstalling the hardware. Still no luck. I have to get my videos backed up for my business - ones that I shot myself - and I have to do it quick so I have room on my hard drive to edit the newer ones. If you have any ideas, please help me. Thanks!