Researchers from Japan have developed the world's first 16 layer dvd with 25GB per layer for a total of 400GB a dvd. Thinking of trading that DVD player in for blue-ray? Might as well not. http://swik.net/User:zedomax/Zedomax/16+layer+Optical+Drives+from+Pioneer+-+400GB+DVD!/b9hfx The question is, Would you consider backing up information of these? Think about it if you had a 400GB worth of movies of songs on one disk and then it was scratched. I would be beyond mad.