D-Link ShareCenter DNS-320L User Manual page 59

Section 4 - Configuration
The Wizard starts to partition the second drive if you have
installed it.
If you would like to change your settings at this stage, click Exit.
The system will now update all of the changes made.
Please be patient during this process. Do not turn off your NAS
during this process.
D-Link ShareCenter DNS-320L User Manual 53