Worked best SD card with Thonny
This code worked in Micro python with Pi Pico: (After a lot of problems.) print(",,,xkchgvsdckhsgDigiKey0 ") print("core Electronics How to setgggg up Pi Pico and Code with Thonny") import machine import sdcard import uos import os # Assign chip select (CS) pin (and start it high) cs = machine.Pin(9, machine.Pin.OUT) # Intialize SPI peripheral (start with 1 MHz) Check it IS 1000000 spi = machine.SPI(1, baudrate=100000, polarity=0, phase=0, bits=8, firstbit=machine.SPI.MSB, sck=machine.Pin(10), mosi=machine.Pin(11), miso=machine.Pin(8)) # Initialize SD card sd = sdcard.SDCard(spi, cs) print(cs) # Mount filesystem vfs = os.VfsFat(sd) #uos.mount(os.VfsFat(sd), "/sd") uos.mount(vfs, "/sd") # Create a file and write something to it with open("/sd/test01.txt", "w") as file: file.writ