title: Crc error with Expansion files
body: <p>Got success in uploading and download the Expansion files <a href="https://stackoverflow.com/questions/10327532/apk-external-data-android-expansion">Apk external data, Android Expansion</a></p>
  
  <p>but now I am facing <em>CRC</em> while unzipping my files. </p>
  
  <p>Not getting exactly where the problem is, Google rename my files as <code>.obb</code></p>
  
  <p>Searching for workaround, if any?</p>
  
  <p><strong>Update</strong></p>
  
  <p>Complete explanation defined here <a href="https://stackoverflow.com/questions/11715855/steps-to-create-apk-expansion-file/11717019#11717019">Steps to create APK expansion file</a> </p>