Browse your storage and select your MPR-17933.bin file directly. Legal and Ethical Considerations
RetroArch is highly strict about BIOS file names and locations. Obtain your legal copy of the MPR-17933.bin file. Sega Saturn Bios Mpr-17933.bin
When you turn on a real Sega Saturn, this code runs first to: Browse your storage and select your MPR-17933
RetroArch requires specific naming conventions for BIOS files. Place the file inside your RetroArch system folder. Sega Saturn Bios Mpr-17933.bin
If you are playing Japanese games, you might need the sega_101.bin (JP BIOS) instead. Configuring in Mednafen/RetroArch