Untitled

<html>
 <form>
  <head>
   <body>
    <table>
    <tr>
     <td>
     <label>Quantidade de dados a serem replicados(MB):</label>
     </td>
     <td>
     <input type="text" name="qnt" id="qnt" />
     </td>
    </tr>
    </table>
   </body>
  </head>
 </form>
</html>

<html>
 <form>
  <head>
   <body>
    <table>
    <tr align="center">
     <td align="left" style="width: 46%">Quantidade de dados a serem replicados(MB):</td>
     <td align="right" style="width: 22%" id="qnt"></td>
    </tr>
    </table>
   </body>
  </head>
 </form>
</html>

<input type="text" name="qnt" id="qnt" />
<input type="button" value="Salvar" id="btn" />

(function() {

    var btnElement = document.getElementById('btn');
    var qtdElement = document.getElementById('qnt');

    btnElement.addEventListener('click', function(){
        sessionStorage.setItem('qtdMb', qtdElement.value);
    });

})();

<table>
    <tr align="center">
        <td align="left" style="width: 46%" id="exibir">Quantidade de dados a serem replicados(MB):</td>
        <td align="right" style="width: 22%" id="qnt"></td>
    </tr>
</table>

(function() {
    var element = document.getElementById('exibir');
    var value = sessionStorage.getItem('qtdMb');
    element.innerHTML = element.innerHTML + value;
})();