   // Create the file if it doesn't exist
   if (!create_if_not_exists(filename)) {
     Serial.println("Not enough space to create file " + String(filename));
+    digitalWrite(ledPin, HIGH);
     return;
   }
 
   // Open the file and write test data
   file = SerialFlash.open(filename);
-  
+  parpadear (3,100);
   file.write(contents, strlen(contents) + 1);
   Serial.println("String \"" + String(contents) + "\" written to file " + String(filename));
   file.close();
-  
+
+  parpadear (3,100);
   // Open the file
   SerialFlashFile ff = SerialFlash.open(filename);
   Serial.print("Opening file: ");

#include <SPI.h>

#define FSIZE 256

const char *filename = "myfile2.txt";
const char *contents = "1234567890ABCDEFGHIJ";

void setup() {
  Serial.begin(9600);

  // wait for Arduino Serial Monitor
  while (!Serial) ;
  delay(100);

  // Init. SPI Flash chip
  if (!SerialFlash.begin(ONBOARD_FLASH_SPI_PORT, ONBOARD_FLASH_CS_PIN)) {
    Serial.println("Unable to access SPI Flash chip");
  }

  SerialFlashFile file;

  uint32_t sz = 21;//ff.size();
  Serial.print("Size: "); 
  Serial.println(sz);
  parpadear (3,100);
  
  uint32_t pos = ff.position();

