#include "SPIFFS.h"

File file;

void setup()
{

  Serial.begin(115200);
  delay(2000);

  if (!SPIFFS.begin(true))
  {
    Serial.println("An Error has occurred while mounting SPIFFS");
    return;
  }

  Serial.print("SPIFFS: Total:");
  Serial.print(SPIFFS.totalBytes());
  Serial.print("/Used:");
  Serial.println(SPIFFS.usedBytes());

  Serial.print("Trying delete:");
  Serial.println(SPIFFS.remove("/test.txt"));

  file = SPIFFS.open("/test.txt", FILE_WRITE);

  if (!file)
  {
    Serial.println("There was an error opening the file for writing");
    return;
  }

  //  file.close();
}

long i = 0, numw = 0;

void loop()
{
  if (file.print("X"))
  {
    i++;
    /* if (0==i%1024) {
        Serial.print(i/1024);
        Serial.print("/");
    } */
  }
  else
  {
    Serial.print("File write failed on pos: ");
    Serial.print(i);
    Serial.print(" / ");
    Serial.println(++numw);

    file.close();

    Serial.print("Trying delete:");
    Serial.println(SPIFFS.remove("/test.txt"));

    file = SPIFFS.open("/test.txt", FILE_WRITE);
    i = 0;
  }
}