sdcardio is an SPI interface SD card library in CircuitPython 6.0 that is optimized in C to be much faster than the original adafruit_sdcard library. Some much smaller/older boards don't have enough memory for this module, in which case you will have to use adafruit_sdcard

The Adafruit Grand Central M4 Express has a built-in SD card connected to the SPI bus, so no wiring or soldering is needed!

To mount the SD card, use the following code. Remember to put it in the file on CIRCUITPY so you can easily call it from or the REPL with import mount_sd.

import board
import busio
import sdcardio
import storage

spi = busio.SPI(board.SD_SCK, MOSI=board.SD_MOSI, MISO=board.SD_MISO)
cs = board.SD_CS

sdcard = sdcardio.SDCard(spi, cs)
vfs = storage.VfsFat(sdcard)
storage.mount(vfs, "/sd")
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This guide was first published on Jul 31, 2020. It was last updated on Feb 27, 2024.

This page (Grand Central M4 Express) was last updated on Jul 24, 2020.

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