Access All Folder Assigned To The Logged-in User:
[filemanager foldername="*"]

This shortcode will let the logged-in user see all the folders assigned to them.

 

Access Default Folders To The Logged-in User:

[filemanager]
This Shortcode Will Allow The Logged-in Users To See their default Folder. The default folder is automatically assigned to each user by their username. You can disable it from the settings page.

 
You can generate custom shortcodes from the Front-end Access page:

frontend access page
Front-end Access Page