The article discusses the use of the LittleFS library and introduces a library developed for use with the esp32 microcontroller, which includes a plugin for the Arduino IDE for uploading files to the microcontroller’s ROM. Make it convenient to load data to store and run. For this reason, if programmers find it difficult to transcode HTML/CSS/JavaScript to be a string manually and switching to uploading files to esp32 and reading the web files directly to use will be something that will require training to use LittleFS as a reliable library.