Select "Go" from the Finder menu and in the drop down menu select the "Connect to Server" option (indicated by the red arrow).
When the "Connect to Server" window appears enter the path for your network drive in the following format: smb://servername/sharename
A window may pop up asking for your credentials. Enter your network user ID and password and click Connect. Note: Depending on what server you are connecting to, you may need to enter the domain name as well. For example, you are using a UWSS computer but connecting to a UWSA shared drive. You will then need to enter your full email address in the username field. Example: firstname.lastname@example.org or email@example.com.
You should now see the files from your network drive.
If you wish to disconnect a mapped drive, in "Finder", choose "File" then "New Finder Window". You can also open the icon on your desktop for the mapped drive.
Select the mapped drive on the left hand menu, then select the "Gear" icon and you will see a drop down menu. Select the option to "Eject" your mapped drive, the mapped network drive will now be removed.