File upload not getting "stored" with record

public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\FileUpload::make('File Upload')
                    ->columnSpan('full')
                    ->preserveFilenames()
                    ->acceptedFileTypes(['image/png'])
                    ->maxSize(1024)
                    ->storeFileNamesIn('file_name')
                    ->enableDownload(),
                Forms\Components\TextArea::make('notes')
                    ->columnSpan('full')
                    ->rows(4)
                 ......
            ]);

    }