I have a folder Assets/source. It has a lot of files (.png,.xml …) and also divided with sub folders inside. Is it possible to have them all copy to the output directory without manually setting them one by one? or to copying this folder to /LocalState at runtime?

I have tried adding it to paths, I cant seem to find it in the installation folder after install. Thanks for any advice.
Copy and paste them to
Assets/...(By default, Build Action is Content , Copy to output is Do not copy. Leave it at default)
During run time :
StorageFolder sourceFolder = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync("Assests/...");