Start size: 40.3GB
Main game files:
Code:
xcrilayla+xzlib+srep+lolz
The z files inside the cpks are compressed with zlib, read more here:
https://forum.xentax.com/viewtopic.php?f=10&t=16011
Videos:
Ofc you can recode them to save space, but then lossy
Audio:
These .wsp files are just multiple audio files concatenated. You can use
this BMS script to "extract" them, however it's imperfect. To "pack" the files again, you can use bincat by aluigi or copy /b. Not much point in trying oggre_wwise, I got better result with msc
Final size: 20.2GB