folder2.html

<tbody id="nodes">
  <tr>
    <td><input type="checkbox" class="async" data-node="/folder1/folder2/file4" /></td>
    <td>
      <span class="icon file-x-icon"></span>
      file4
    </td>
    <td>10 KB</td>
    <td>group1</td>
    <td>group2</td>
    <td></td>
  </tr>
  <tr>
    <td><input type="checkbox" class="async" data-node="/folder1/folder2/file5" /></td>
    <td>
      <span class="icon file-x-icon"></span>
      file5
    </td>
    <td>15 MB</td>
    <td>group3</td>
    <td>group4</td>
    <td></td>
  </tr>
</tbody>