<script>
    console.log('Сообщение работнику');
    $(document).on('change', '#btn_send_file', function() {
        var send_name = $('#send_name');
        var send_name_val = send_name.val();
        var this_final_name = $('#this_final_name');

        console.log(send_name_val);
        this_final_name.html(send_name_val);

    });
</script>
<div id="send2" class="modal">
    <div class="modal__body">
       fghfghfghfghfgh
    </div>
</div>