D-Link DNS-320L User Manual page 105

Section 4 - Configuration
Modify the assigned Privileges/Access methods for the user if desired. Select
either FTP or WebDAV. CIFS and AFP are set by default.
Click Next to continue.
Enter the re-assigned amount of disk space you wish to assign the user on
each volume. Type 0 to provide unlimited disk space to the user.
Click Next to continue.
D-Link ShareCenter DNS-320L User Manual 99