Are you sure your app stores its data in the Android data subfolder? That folder is usually reserved for system files. In any case, when I go to view that folder in Samsung file manager, it says "due to security restrictions, the contents of this folder can only be viewed on a computer". So, you should connect your phone to a computer and then try to open the folder again, if the data you are looking for is truly in that folder. If your data is accessible to you through your app, there should be no reason to go hunting for it in file manager.
