title: getFilesDir() vs getExternalFilesDir(), which one is more recommended?
body: <p>As far as I've noticed, using <code>getFilesDir()</code> to store data (camera captures in my case) is somewhat temporary. I say somewhat because if I close and reopen the app, I'm able to access the directory and files list, but not the file itself.</p>
  
  <p>Is my logic wrong or is that by design?
  Out of the 2 methods, which is more recommended in :</p>
  
  <ol>
  <li>general</li>
  <li>my case (privacy is needed)</li>
  </ol>