Unable to add and access SMB external mount; red square

[carlisle]

of course! but again, in your quote that guy just asserted what you just said:

External storage / SMB share redux

As a test I setup a NextCloud (v15) server and it works flawlessly with SMB including getting a red light when you put in bogus credentials.

since:

WINDOWS blocks the log in

And the consequence to this is nextcloud showing the red square.

When I said

nextcloud server prevents him from logging in with wrong credentials

I should have expressed that it is Windows preventing his access and nextcloud communicated this denial through the red square icon.

but no,

That’s your windows problem allowing anonymous access to the share

there’s not anonymous access allowed.