private async void AddFileButton_Click(object sender, RoutedEventArgs e) { DeactivateMultiSelect(); String[] Token = await StorageInterface.PickExternalStorageFiles_OpenFiles(); for (int i = 0; i < Token.Length; i++) { StorageFile file = await StorageInterface.GetStorageFileFromToken(Token[i]); await file.CopyAsync(SourceFolder, file.Name, NameCollisionOption.ReplaceExisting); } Files = await SourceFolder.GetStorageFileArray(); ReLoadPage(); }