SPIFFS/LittleFS with ESP8266

The loop() is empty , im not doing anything there atm .
I made another project and I searched for * nodemcu esp8266 * and I chose NodeMCU 1.0 (ESP-12E Module) .
Now my ini. file is :

[env:nodemcuv2]
platform = espressif8266
board = nodemcuv2
framework = arduino

What im trying to make is to access my index.html file using SPIFFS and LittleFS ( because as I read about them , this is what they do ) . But I dont know how to do that .