thank you for these suggestions but..
I have tested with an IP address instead of name
I have tested from another computer with same IP adresse/user/password without any issue
but still the same 🙁
after reboot the RaspPi starts in „emergency mode“ without IP connexion available, the only way to change something is plugin screen&keyboard…
The real issue is that I don’t know where is configured the mounting of external and the only way I know is to rewrite a new image on my SD card…
Can you help me to save time saying which file I have to delete or in which fil e I have to delete lines ?