#include <SD.h>

File file;

void setup() 
{
    Serial.begin(9600);
    if (!SD.begin())
    {
        Serial.println("SD card not detected");
    
        file = SD.open("harry.txt" , FILE_READ);
        Serial.print("Total Characters: ");
        Serial.println(file.size());

        if(file)
        {
            Serial.println("Harry Potter");
            delay(2000);
            while (file.available())
            {
                char data = file.read();
                Serial.print(data);
            }
            Serial.println();
            file.close();
        }
        Serial.println("File read successfully");

    }
    else 
        Serial.println("SD card detected");

}

void loop() 
{
}