Plex cannot find my NAS directory on Zorin OS 16.1 Core

Hello,

I have an issue with Plex server unable to find the directory of my WDMycloud NAS.
My NAS is working well with Plex on Windows 10 so do its library.
In Zorin OS I have to manually mount my Nas on anonymous session, and I am able to navigate between its folders where my media are.
But once I go to my plex page, I cannot add my Nas folders because it cannot show the NAS on the suggested directory.
I have tried to copy the path (shown in the properties of the NAS in folder manager) and paste it directly in the form field in order to add the new library, but it does not work.
Capture d’écran du 2022-08-28 20-05-19

My WDMycloud is in NTFS format and the folders are in write/delete access, so I do not understand what cause this issue. The plex server is running on my computer and isn't installed in my NAs because I have not this features that recent NAS have. In Windows 10 it works perfectly.
My question is : Is there a folder or a directory in / or in /home where my Nas appears so that I may choose the right directory in plex ?

I am a new user of linux, and I am kind of lost with all the folders that exist on Zorin OS.

I have been looking for many topics about plex on ubuntu forums, but I am not confident with my knowledge of linux to solve this issue alone.
So I ask here for some help.

Thanks.

I have never used Plex so any help I offer may be useless. However, I did find this guide:

...that following through may help you to Identify the issue.

Don't know if this old forum thread of any help:

https://zoringroup.com/forum/5/15437/

Finston Pickle was the expert when it came to NAS issues and I think star treker also.