Hello,

Try this:

f=open("toto.txt","w")
f.write("kkk")
3
f.close()
import os
os.stat("toto.txt")[8]
0

Always 0 returned on esp32 internal flash, for sd card the right date is returned.

For esp32-idf3-20200605-unstable-v1.12-510-g1e6d18c91.bin, esp32-idf3-20200529-unstable-v1.12-478-g1662a0b06.bin bug is present.

The firmware esp32-idf3-20191220-v1.12.bin work correctly.

Regards.