SD cards are everywhere. In phones, cameras, handheld gaming consoles and more. You can even use an SD card with a Raspberry Pi Pico. Here is a tutorial on how you can connect an SD card to a Pico and read and write to its FAT32 filesystem. Along the way we cover SPI and how to wire an SPI device to your microcontroller board.
Code: https://github.com/garyexplains/examples/tree/master/Raspberry%20Pi%20Pico/sdcard_spi
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