I believe this description is enough and very clear (before posted link): Plus, anybody can extract SVF from inside SVFX and see the content of SVF with svfx. I do not care about it, have made for fun and if someone want it, because download almost impossible. Yes. It is because SVFtoSVFXv2 does not compress anything, again. Inside CMD of SVFtoSVFXv2: Code: 7z.exe a -m0=Copy Try this Yourself. Make "store" 160 SVF. x64 to x86 SVFs are the best case. Compress 160 SVF together with smv.exe, at least LZMA2 and dictionary size 768 MB with 7-zip GUI. Add 7-zip SFX module + config.txt and that is it, saved about few hundred MB. I have SVFX: Code: en_windows_7_ultimate_with_sp1_x64_dvd_u_677332.iso to: Code: en_windows_7_home_premium_with_sp1_x86_dvd_u_676701.iso with only 400 MB!