title: how to create a folder on external sd card
body: <p>I have pbm in creating a folder on sd card.
  this is how i did,</p>
  
  <pre><code>adb shell
  
  mkdir /mnt/extSdCard/tmp
  mkdir failed for /mnt/extSdCard/tmp, Permission denied
  </code></pre>
  
  <p>which gives me error like above,</p>
  
  <p>any help regarding the same is appreciated.</p>
  
  <p>I have also tried other command like
  <code>mkdir /storage/extSdCard/tmp</code> which gives me same error.</p>
  
  <p>-Thanks,
  Manju</p>