I first tried these blank DVDs and they did not work for me and I was very frustrated. There was clear labeling on the package that new firmware was needed for many DVD writers to work with these discs. However, my DVD writer was a variation of what was listed. So I tried about 10 discs and only 1 worked. Tonight I downloaded the firmware for a variation of my HP drive and all works fine.Bottom line - expect to download the firmware and these will work great.