What is the option "share" means in the latest external storage app?

I have a fresh installation of version 13.0.2, and I want to use my current windows share.
I have enabled the external storage app and found an option “Share” in SMB/CIFS that I have not found it in manual.
What is this option means ?

Nextcloud version : 13.0.2
Operating system and version : Ubuntu 18.04
Apache or nginx version : Apache
PHP version : 7.2

The option “Share” in the configuration menu, which shows up if you klick on the rack-wheel, allow or disallow the users to share files from this external storage space.

No, it’s not on the rack-wheel.
It’s the blank under configuration row.

I do not understand what to fill in. I have not found this in domuments.

Ah, now i understand. You put there the name of your SMB share.

Share: Management

It would look like this at Windows \Host\Share

My share host is ‘’, and the share folder is ‘tools’.
I’ve tried to fill ‘Host’ blank with ‘’.
And ‘Share’ blank with ‘tools’, ‘\\\tools’ or ‘//’.
But it still can not connect, I was sure the username ant password is true.