Build filesystem image fail

Hello all,
I’m trying to compile software for the ESP32 controller with the arduino framework. Compiling and
build filesystem image run without error.
But the compile process seems to hang (the little wheel still spinning) and the filesystemimage.bin is only 512 kb in size.
I am working on a MAC and have tried it on 2 machines with the same result.
I also try spiffs and littlefs with the same result.
Does anyone know advice?