SETUP
There are several ways you can detect and setup a NAS but QNAPs Qfinder Pro is the fastest and this is what we've been using for years.
Depending on the usage you want for the NAS you can configure it either for Home or Office use. The first also loads multimedia applications while the second only loads necessary services (we used Home).
After you make the choice you only have to enter a new name for the NAS and a new password (if you want to change the default ones), setup the network settings, select the applications you want to be available and choose the desired configuration for the drives.