Instead of playing the duplicated, poorly translated games pre-loaded on the device, custom firmware allows you to load your own legal ROM library via a MicroSD card.
Select your MicroSD card as the target drive (double-check to ensure you do not select your primary computer drive).
Community-optimized cores can improve frame rates and reduce input lag.
Turn on the console. The first boot may take up to a few minutes as the custom firmware expands its file system and maps the hardware buttons.
The Sup M3 hardware can struggle with heavy Super Nintendo titles (like Super Mario Kart or Star Fox that use special chips). Set the emulator frameskip to "1" or "Auto" for a silky-smooth, playable experience.
The Ultimate Guide to SUP M3 Custom Firmware: Unlock High-Quality Performance