title: apk expansion file not downloading from playstore
body: <p>I am working with the sample apk expansion file downloaded from the SDk. My main expansion file is about 5 MB of size and its format is <code>"main.1.mypackage_name"</code> .</p>
  
  <p>I uploaded my app in play store as a draft application along with the expansion file.But the issue is when the expansion file download progress,one folder is created with the package name under <strong>"Android/obb/mypackage"</strong>. But there is no such file inside that folder.</p>
  
  <p>Sometimes i am getting <code>STATE_FAILED_UNLICENSED</code> message from playstore while the download begins.</p>
  
  <p>What should be the reason of this ? Anything wrong with the file name format or something ?  Can anybody help me.</p>