This takes ~1 hour but is .
: Use balenaEtcher to "flash" the image onto your 256GB SD card or USB drive.
To make your 256GB build look professional with box art and videos: Main Menu > Scraper Select the systems you want to scrape. Scrape Now
Download Batocera for free legally. Build your own 256GB collection using your own legally backed-up games or public domain titles (homebrew).