How to connect to my NAS Network Attached Storage device on my iMac?

How to connect to my NAS Network Attached Storage device on my iMac? Video Clips. Duration : 3.35 Mins.

When I first got my NAS and I was new to and still am to my iMac I couldn't find my NAS. This video would have helped me out alot. Hope this helps the new iMac users I know it would have helped me out.