General Configuration For Access
Each model NAS device is different, and will take different processes to set it up, Be sure to read all the instructions, every one comes with something of a "configure home network storage" guide.
Some NAS devices may be running Windows-based operating systems, in which case, it functions almost exactly like a Windows server, and would integrate with Active Directory. While this is extremely convenient from a systems administrator's standpoint, Windows-based NAS devices are considerably more expensive than others.
Windows systems aside, some manufacturers like to create their own operating systems, usually Linux-based or some other open sourced operating system. These NAS devices usually have what's called a web-based graphical user interface, or "web GUI". This means you browse to the IP address of the device, and you'll be prompted for login credentials. Once you're logged into the device's web GUI, there will be many administrative options. You'll be able to do things like change the password, create and manage users and folders, configure the time zone, and upgrade the device's firmware.