I can tell you how to find out what files and photos he is exchanging using the Snapchat program https://www.toptrackingapps.com/best-snapchat-spy/ - by the way, top applications that will help you do this carefully, remaining unnoticed. But just remember that the application will need to be quietly installed on your husband's device beforehand. It's good that if he has Android, because iPhones have not yet learned how to track such spyware, even if they promise it. I really liked the monitoring features of FlexiSpy.