Disclaimer: Batocera is free and open-source software. This guide is for educational purposes. You must own the original game cartridges/discs for any ROMs you download. The author does not condone software piracy.
is widely considered the "sweet spot" for this hardware, offering enough room for the OS and thousands of 8-bit to 32-bit era games. Batocera.linux - Wiki Why 32GB on a Raspberry Pi 3? Optimal Performance Download Batocera 32gb Raspberry Pi 3