Use balenaEtcher or Raspberry Pi Imager . Write the image: Open your flashing tool and select the extracted .img file.
Select your target drive (be careful, this wipes all data on it). Click or Write and wait for completion. Boot Batocera batocera-32gb-raedy-to-use-part1-rar
Use a tool like WinRAR or 7-Zip and right-click only the part1.rar file. Use balenaEtcher or Raspberry Pi Imager