I've done the compress.bat Convo and took around 7 hours all in all from 56gb install and got these Dvd sizes
BAK_1= 4,23*Gb
BAK_2= 4,32*Gb
BAK_3= 13,6*Gb
BAK_4= 4,26*Gb
BAK_5= 4,02*Gb
BAK_6= 4,17*Gb
BAK_7= 4,20*Gb
BAK_8= 1,60*Gb
So a good conversion and wonder if Dvd 3 is because of all Dlcs installed in the game as well
And installs in around 1.5 minutes as well on my system