Hello all
@OttoKerner
I do what you suggest : create on NAS an account with the same name and password than my w10 account. I removed the credentials with the other account too.
→ the access is OK by the explorer on W10 : so I can acces NAS files without any credentials on w10
But
On PLEX, I do a complete desinstallation / reinstallation, I add my files to library : OK
After few hours PLEX has removed again all files, so that my library is empty
When I do a scan i saw all my directories on NAS scanned by PLEX but it remains empty 
If you have another idea ?
Thanks for help
Multinet