title: Getting all the total and available space on Android
body: <p>To my knowledge, on Android, there is:</p>
  
  <ul>
  <li>Internal memory for apps and cache</li>
  <li>Internal SD Card on some phones (not removable)</li>
  <li>External SD Card for music and photos (removable)</li>
  </ul>
  
  <p>How do I get the total and available for each with a check that they exist (some phones do not have an internal SD Card)</p>
  
  <p>Thanks</p>