Files allowed to access - You can use the "files allowed to access" list to control files you want users of a group to access and see. The permission for accessing these files will follow the permission of the virtual paths that these files reside in. If files are not inside the allowed-to-access list, the user can not see and access them. If the "files allowed to access" list is empty, the FTP server will skip this option.
Files denied to access - Files denied to access can be used to control files you don't want users of a group to access and see. If the "files denied to access" list is empty, the FTP server will skip this option.
Choose FTP Commands to deny - Choose denied FTP commands to users of a group.