NOTE: The SEP SBE product does not have the ability to whitelist a URL or a USB device.
You cannot edit the default policy. See Create custom antivirus policies.
Symantec does not support any mechanism for using a network path (UNC) for creating a custom exclusion and Wildcards are not accepted.
Before creating exclusions it is important to work with technical support resources from the manufacturer of the software being excluded in order to ensure that all necessary paths and files are included in the rule-set. Making sure to exclude all the recommended files and folders per developers specifications will help reduce any conflicts with Symantec Endpoint Protection Small Business Edition Cloud.