I have Windows Vista 64bit using a Pioneer Model BDR-2209 DVD burner, and I am using Optical Quantum 50GB 6X BD-R DL media. I have copied over 28gb of data files to burn to the dvd then selected burn files to disc, and it runs for a while and stops saying there is not enough free space on the disc. I know it has 46gb free on the dvd so why is this happening? I even tried to use an old copy of nero version 9 and It it starts to burn then gives me an error and stops. Can some please help me here, I would like to backup my 28gb's of data to a 50gb dvd.