Recommended tools: Raspberry Pi Imager, BalenaEtcher, or USBImager.
A gaming console isn't complete without games. To fill your 32GB card with ROMs, you have two main paths: Download Batocera 32gb Raspberry Pi 3
This ensures you get the latest features and bug fixes. Recommended tools: Raspberry Pi Imager
As of Batocera v38/v39, the file name will look like: batocera-39-raspberry-pi3-32gb.img.gz Download Batocera 32gb Raspberry Pi 3
If you have a and a 32GB Micro SD card , this is the definitive build. It maximizes storage for the best library of games (PS1 and below) without wasting space on heavy PSP or Dreamcast ISOs that the Pi 3 cannot run well.