I figured it out by myself. 2 issues:
1. Issue described here https://github.com/espressif/esp-idf/issues/1437 . Basically I had to set CONFIG_SPIFFS_META_LENGTH to zero.
2. My use of fread() is incorrect. The correct use for this case is bytes_read = fread(file_buf, file_size, 1, file); or bytes ...

Hello,

I'm having trouble reading a file from SPIFFS. I have created an image with 2 files using mkspiffs tool. Successfully flashed it to the esp32 board memory, to the point where I can see in boot the total and used space (numbers which are correct with what i specified and the size of the 2 ...