If you want to create a Public Link directly using the Web-client, here's a short guide.

What you will need to do:

1. Open your browser and login with your credentials

2. Navigate to the folder/or file you want to send with a Public Link

3. When you click/or right click at the file an option menu will show/pop up and you can select to create a Public Link 

4. A pop-up will show and you can add a personal message, enable password protection and add an expiry date - press save when you are done. 

5. The URL-link will now be shown and ready to be sent.