To get BIOS files working on your PS Vita with RetroArch, you must place them in the correct directory and ensure they are named exactly as the emulator expects Required File Location
If you installed RetroArch via VPK (e.g., from the official buildbot), the data folder is created automatically on first launch. In some cases, it may be:
To use RetroArch on the PS Vita for playing various retro games, you'll need to understand that BIOS files are required for certain systems to function properly within the emulator. BIOS files are essentially the firmware of the original gaming consoles, and they are necessary for emulating those consoles accurately.