Hello all this is my first post, so if I'm repeating something I am truly sorry but I have looked all over and I hope you guys can help. I currently just bought the Sony DRU-510A and a package of (though I've returned Fuji packages twice) Memorex DVD-R 120 minutes. I'm also using NeroVision with the MPEG-2/DVD Encoder and trying to burn my movies. Now to get to the problem, I stick in the disk and Nero takes a look at it, it comes up as 4,489MB which isn't 4.7GB, more like 4.4GB and creates a problem when I'm trying to burn my files with NeroVision that happen to be 4.64GB and only 100 minutes (ish) long. NeroVision then tells me (after the encoding from VCD-DVD) that there is not enough space on my 4.7GB disk for the 4.64GB movie (this was done in DVD-Video mode through NeroVision). My question is after 3 different packs of DVD-R's and countless rendering times what my problem is, are DVD-R's only 4,489MB? Or is my drive aparently messed up, OR could it be Nero (Even though it's never failed me before it could just hate DVD). Thanks guys I hope you can help me.