Over the last year I bought 2 packs of 50 Maxell DVD+R 8x 4.7 gb RW. I cannot for the life of me get these to burn anything. Not data not video and not files. I get "please use a writable disk in the drive" all the time. Do I need to format these DVDs before I use them. I believe they are already formatted but I could be wrong. I use the best Nero software Windows 7 Pro and some freeware software to attempt to burn with. I also use some very new burners and some a burners just a few years old. I can burn a CD not problem but not these. i can also burn with DVD-R. Can you advise me what I need to do with these DVDs to utilize them. I bought them from 2 different store locations 2 different named stores. Any help is as always appreciated. Thank you.