D-Link DNS-320L User Manual page 234

Section 4 - Configuration
To create a new folder, click the New folder at the bottom of the volume you
wish to create the new folder in. Enter a name for the new Folder. Click OK.
Select the newly created folder and click Apply.
To verify that the file was copied to the destination, browse to the folder in
question.
D-Link ShareCenter DNS-320L User Manual 228