Error in access SD card

  • Dear all,
    I'm using M5Stack Fire with firmware v1.9.8 and LoRa 868MHz module (blue one).
    The programming through UIFlow was successful until now with some nice tests of

    • ENV III sensor,
    • NTP timing,
    • LoRa init example,
    • ...

    I'm trying to access an SD card now to log the ENV III sensor data locally.

    from m5stack import *
    from m5ui import *
    from uiflow import *
    with open('/sd/FileName.*', 'r') as fs:
      lcd.print((, 0, 0, 0xffffff)

    Unfortunately the example code hereunder gives me an error.

    File "<string>", line 15, in <module> OSError: [Errno 19] ENODEV

    The SD card is a SanDisk Extreme Pro 32Gb.

    • I formatted it under Windows 11 into Fat32.
    • I copied a single text file on it.
    • I inserted it the pads facing up (same direction than the screen).

    Could someone help me out in the debugging ?

    Thanks in advance,

  • Edit:
    is there any limit in size for the SD cards ?
    if so, what is it ?

    Best regards,