title: Android Download Manager setDestinationInExternalFilesDir
body: <p>I am using the Download Manager and when I use </p>
  
  <pre><code> setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, "example.ext");
  </code></pre>
  
  <p>the files are downloaded to Android/data/com.example.app/files/Download folder.</p>
  
  <p>When I try </p>
  
  <pre><code>setDestinationInExternalPublicDir("/folder", "example.ext");
  </code></pre>
  
  <p>I get: 
  <code>IllegalStateException: Cannot create directory mnt/sdcard/folder</code>. 
  I've set the WRITE_EXTERNAL_STORAGE permission too.</p>
  
  <p>What am I doing wrong?</p>