m5stack basic SDcard mount

[0lympus]

Hi all, im having troubles reading struff on an SDcard.

Here is the code I'm trying to run. The error message in the listDir function keeps popping.

Anybody got examples or any cue?

thanks

#include <Arduino.h>
#include "FS.h"
#include "M5Stack.h"

void setup(){
    M5.begin(true, true, true, true);
    M5.Power.begin();
    Serial.begin(115200);

    listDir(SD, "/", 0);
    delay(5000);

}


void loop()
{
  
}
void listDir(fs::FS &fs, const char * dirname, uint8_t levels){

    M5.Lcd.printf("Listing directory: %s\n", dirname);

    File root = fs.open(dirname);
    if(!root){
        M5.Lcd.println("Failed to open directory");
        return;
    }
}