To convert an file back to an ISO format, the most direct and reliable method is using the Dolphin Emulator , as RVZ is its proprietary lossless compression format. Method 1: Manual Conversion via Dolphin Emulator
Keep your library as RVZ for archiving. Convert to ISO on-the-fly only when needed. Do not store both long-term – you will waste terabytes. convert rvz to iso upd