Uploaded March 2019 | Updated September 2026, 3 weeks ago

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This tutorial explains how to mount the SPIFFS file system, create a file and write some content to it.

SPIFFS stands for SPI Flash File System and it is one of the file system types supported by the ESP32.

Written tutorial at my blog, with full source code:
techtutorialsx.com/2018/08/05/esp32-arduino-spiffs-writing-a-file


Video with the explanation on how to read a file: youtube.com/watch?v=xc93ygUngmI&feature=youtu.be

ESP32 FireBeetle board from DFRobot:
dfrobot.com/product-1590.html

SPIFFS file system GitHub project: github.com/pellepl/spiffs

IDF documentation: docs.espressif.com/projects/esp-idf/en/latest/api-reference/storage/spiffs.html

SPIFFS Arduino core header file:github.com/espressif/arduino-esp32/blob/master/libraries/SPIFFS/src/SPIFFS.h

File class: github.com/espressif/arduino-esp32/blob/master/libraries/FS/src/FS.h#L47

Related content (written tutorials):
- Append content to file in SPIFFS: techtutorialsx.com/2018/08/13/esp32-arduino-spiffs-append-content-to-file
- Serving Bootstrap from the ESP32 SPIFFS file system: techtutorialsx.com/2019/03/04/esp32-arduino-serving-bootstrap
- SPIFFS file upload plugin: techtutorialsx.com/2018/08/24/esp32-arduino-spiffs-file-upload-ide-plugin