title: Delete file on Android after 24h?
body: <p>I´m a junior developer.I´m am bulding an app for Android.
  My app will have audio files.But for this Audio you have to pay.The audio will disappear after 24h, then you have to pay again for the audio,always will be the sames audio files.The user will pay always form Google Play(somenthing like free and pro version).</p>
  
  <p>How can I do this.Make a packge and then delete it,(i think this is not posibil).
  I can do it with the function "delete" but what about the package?</p>