1. From the top menus, select Go > Connect to Server...
(
-K)

*The
Key
is also known as the "Command" key and is represented by a
symbol
in the drop-down menus

You should see cgra_hub on the left. Hit connect.

Choose Guest
and hit "Connect" again.

Choose "professormarks" and
hit OK.

This will appear on your desktop.
You can double-click it and save things/drag things to in the folders inside, just as you would a regular disc, folder, or your network drive.
You can log out of this drive by dragging it to the trash can in the Dock. The trashcan will change to an eject symbol.