Draytek Vigor2710 Series User Manual page 273

Access Rule
Before you click OK, you have to insert a USB disk into the USB interface of the Vigor
router. Otherwise, you cannot save the configuration.
It determines the authority for such profile. Any user, who
uses such profile for accessing into USB disk, must follow the
rule specified here.
File – Check the items (Read, Write and Delete) for such
profile.
Directory –Check the items (List, Create and Remove) for
such profile.
261
Vigor2710 Series User's Guide