How to make root share folder un-browseable or hidden
OS5 X32 & X64 series
Home > Storage > Share Folders > choose a folder > Samba > Browseable > No > Apply.
OS6
Control Panel > File Sharing/Privilege > Shared Folder > Samba > Browseable > No > Apply.
OS7
Control Panel > PRIVILEGE > Shared Folder > choose a folder > Edit > Uncheck Browsable > Apply.
* How to know my NAS belong to which OS version?
http://thecus.kayako.com/default_import/Knowledgebase/Article/View/606/0/thecus-raid-roaming-table