title: External SDCard file path for Android
body: <p>Is it true that the file path to external SDCard on Android devices are always <strong>"/storage/extSdCard"</strong>? If not, how many variations are there?</p>
  
  <p>I need it for my App to test the availability of <strong>external</strong> SDCard.</p>
  
  <p>I am using Titanium, it has a method <strong><em>Titanium.Filesystem.isExternalStoragePresent( )</em></strong>
  but it always return true even external SDCard is not mounted. </p>
  
  <p>I think it detect SDCard at local storage thus return true. But what I really want is detect whether physical SDCard is mounted or not.</p>
  
  <p>Can I do this by detecting the existence of file <strong>"/storage/extSdCard"</strong> alone?</p>
  
  <p>Thanks.</p>