If you already have a large ISO, you can use tools like .
NKIT is designed to revert ROMs back to a "clean" 1:1 state. It offers excellent compression (often matching RVZ) but requires conversion back to ISO for some emulators. NKIT is best for archival purposes. gamecube roms highly compressed
If your internet speed is capped at 10 Mbps, a 1.4GB download takes about 20 minutes. A highly compressed 400MB file takes roughly 5 minutes. If you already have a large ISO, you can use tools like