I use a Synology NAS with an eSATA HD for backup, and various Synology backup jobs to make sure my data is backed up.
And I wanted to check that the data is being backed up. But for some reason over AFP I couldn't see it. I could see it over SMB, and the Shared Folder control panel in DSM showed it as shared.
After some investigation I found that the user account must be enabled to see satashare over AFP.
Go into the 'user' control pane, select the user you want to have access to satashare and make sure the read/write box is ticked.
They should then be able to see satashare after connecting, either through the left hand side window onf the finder, or apple-k to connect.