platformio
mkspiffs tool location
~/.platformio/packages/tool-mkspiffs/mkspiffs
A Better Arduino IDE - Getting Started with PlatformIO
https://www.youtube.com/watch?v=EIkGTwLOD7o
~/.platformio/packages/tool-mkspiffs/mkspiffs
https://www.youtube.com/watch?v=EIkGTwLOD7o