External storage via SMB sharing from a Mac?

Has anyone here ever been able to successfully add external storage to nextcloud (or owncloud) which is a SMB share from a Mac? For whatever reason I can configure it so that I get a green light, but in any client I can only list files and folders. Attempting to open a file immediately sends me back to the parent folder.

If you have any thoughts or suggestions on this please let me know. Thanks in advance.

Do you get any errors in your logfiles?

Hey, can you tell me when what you did to even get a green light? I am trying to do the same thing. Use the SMB protocol, but I don’t what goes where in the boxes.