
Pretty easy to set up and use. Most of time. A fruitful web search was "arduino spi interface microSD". It's quite the cookbook from there. Follow the recipe and suddenly you have a beautiful removable disk for games. I haven't had any issues with these devices so far after about 7 hours of fiddling during 4 gaming sessions on 4 different days. Build quality is "kids toys", not automotive or aerospace.

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