title: What is the largest file size of a single file my app can save?
body: <p>I'm writing an iPhone app that needs to download files that are sometimes over 4 GB, and save them for file share in iTunes. Of course, I'm warning the user if insufficient space is available.</p>
  
  <p>But is this actually possible on an iPhone? Does the file system support such huge files?</p>
  
  <p>Secondly, will such an app be approved by Apple?</p>