SETUP
As always prior to using the device i strongly recommend heading over to the officiall QNAP support page to download both the latest QTS version and the software you might need.
The setup procedure uses an explorer window and is very user friendly. You just need to select your model from the drop down menu on the upper left corner and follow the instructions.
The setup wizard also allows you to setup the device using the myQNAPcloud feature so unless you plan on using the NAS Server solely from that location i recommend following that path.