The first group is called Quick Configuration. It is a quick setup Wizard, actually.
Manual setup begins with the System Settings group which in its turn begins with the Server Name page where you can specify the network name of your TS-109Pro II.
The NAS’s system date and time are configured manually or via an NTP-server on the Date & Time page.
The File Name Encoding Setting page is where you can choose a character set for displaying non-Latin filenames correctly. You can choose from 10 different sets.
On the Configure SMTP Server page you can specify your SMTP server account for sending letters informing about failures in the operation of the NAS.
The current parameters of the group can be viewed on the View System Settings page.