D-Link DNS-320L User Manual page 363

Section 4 - Configuration
Under Google Drive Linked Account, the drop-down menu
now lists your account details.
Under Sync Folder, click the Browse folder to locate the
directory you want to use.
Under Step 1, Select Sync Folder, select the folder you want
to use. You can use the drop-down, click folder menu to select
a folder.
Click Next to continue.
D-Link ShareCenter DNS-320L User Manual 357