The version in NuttX is based off an older version of SPIFFS (before all
of the security related changes) and may have incompatibilities with the
current SPIFFS.
do you remember which exact version of SPIFFS it was?
You will find all of that information in fs/spiffs/README.md
it seems like a copy of https://github.com/pellepl/spiffs/blob/master/README.md
do you mean it was 0.3.7?
Yes, it looks like there has been only a few changes in that repository
in the last few years. So the NuttX version looks like it is still
based on the latest frozen code. So it is still a dead project.
Hmmm.. maybe I am confused. Maybe I was thinking about LittleFS that
got the big security change.
