Embedded file system

[PeterR]

I need a readonly filesystem to hold the webserver.
Its a legacy cross platform set of web pages so (ideally) I need directory support.
I want to be able to create a the webpage image and program that using esptool

I seem to remember bumping into a SPIFFs implementation with directory support but cannot find again!
FATFS would be fine but I cannot find an example which creates and uploads the image.

[PeterR]

Found it: https://github.com/loboris/ESP32_spiffs_example