Ensure the final file after extraction is in .iso format.

The Ultimate Guide to Downloading Highly Compressed, High-Quality PS3 ISO Games

If you are setting up a specific game or emulator, let me know you are trying to download or whether you plan to play on a PC emulator or actual PS3 hardware . I can provide tailored settings or specific troubleshooting steps. Share public link

What are you trying to compress or install?