title: Find location of a removable SD card
body: <p>Is there a universal way to find the location of an external SD card?</p>
  <p>Please, do not be confused with <a href="http://developer.android.com/guide/topics/data/data-storage.html#filesExternal" rel="noreferrer">External Storage</a>.</p>
  <p><a href="https://developer.android.com/reference/android/os/Environment#getExternalStorageState(java.io.File)" rel="noreferrer"><code>Environment.getExternalStorageState()</code></a> returns the path to the internal SD mount point, such as <code>/mnt/sdcard</code>. But the question is about the external SD. How do I get a path like <code>/mnt/sdcard/external_sd</code> (it may differ from device to device)?</p>
  <p>I guess I will end with filtering of the output of the <code>mount</code> command by filesystem name. But I'm not sure this way is robust enough.</p>