Add convenient File Manager, Sitemap and eCommerce quick link icons to the toolbar.
Which users have which of these quick link icons shown is controlled through a dashboard page at Dashboard > System&Settings > Basics > Toolbar Quick Links. See the documentation for deatils.
Toolbar links available:
For users that do not have the Toolbar, have a look at the even more convenient Front End File Manager addon.
See more addons by JohntheFish