Creating game backups requires owning the original discs. Distribution of copyrighted games is illegal.
If you are playing on PC, the Dolphin Emulator is incredibly flexible. It can play compressed WBFS files directly, as well as standard ISOs, without needing to convert them first. wbfs archive
FAT32 drives cannot hold a single file larger than 4GB. Most scrubbed .wbfs files are smaller than this, but a few massive games (like Super Smash Bros. Brawl ) might exceed it. Creating game backups requires owning the original discs