A Wii Disc contains 2-3 "Partitions":Thank you i dont exactly understand this but hey, ill give it a shot!
- U pdate - if you have an older System Menu Version,the Disc can update your Wii.
- G ame - as the Name says
- C hannel - some Games for Example "Wii Fit" als installs an Channel on the Wii Menu too.
If you look in the WiiBackup Manager
you see,which Partitions the Game ISO have.
"Downloaded" wbfs Files usually have no other Partitions.
Thank you.