Well ran into something weird, I wanted to put these 2 movies on my media player, the Dune so at first I made an MKV and it failed now these discs include the original move and DC so I made an iso that came out to 44gb. The Dune would not play it in ISO or a BMDV structure. But my 900 played it so Fab made it correct now there are 4 titles 800, 801, 850, 851 on the 900 I can play all 4 titles. So I made all 4 titles in to MKV's and 2 are 25gb and the other 2 are 24gb, so what gives that's way more space then whats on the disc!