Nintendo Wii Roms Highly Compressed -

The primary reason for the large size of standard Wii ROMs is "garbage data" or padding. To ensure smooth reading by the original console's disc drive, Nintendo filled the remaining space on every physical disc with random or empty data. The Problem:

A primary reason for the large size of raw Wii ISOs is the inclusion of "junk" or "dummy" files. Nintendo used these files to push meaningful game data to the outer edges of the physical disc, where the read speed is faster due to the disc's rotational physics. nintendo wii roms highly compressed