This parameter specifies a list of absolute pathnames the root of which are allowed to be exported by user defined share definitions. If the pathname exported doesn't start with one of the strings in this list the user defined share will not be allowed. This allows the Samba administrator to restrict the directories on the system that can be exported by user defined shares. If there is a "usershare prefix deny list" and also a "usershare prefix allow list" the deny list is processed first, followed by the allow list, thus leading to the most restrictive interpretation. NULL /home /data /space