Setting the policy lets you list the URL patterns that specify which web apps are granted access to file types.
Leaving the policy unset means DefaultFileHandlingGuardSetting applies for all web apps, if it's set. If not, users' personal settings apply.
For URL patterns which match neither FileHandlingAllowedForUrls nor FileHandlingBlockedForUrls, DefaultFileHandlingGuardSetting, or the users' personal settings, will be used, in that order.
URL patterns must not conflict with FileHandlingBlockedForUrls. Neither policy takes precedence if a URL matches with both.
For detailed information on valid url patterns, please see https://cloud.google.com/docs/chrome-enterprise/policies/url-patterns. * is not an accepted value for this policy.