title: NSFileManager: Copy file not success
body: <p>I want to copy files located at <code>/Library</code> to the folder <code>/User/Library/AddressBook/Sample/</code>,
  I used: </p>
  
  <pre><code>[[NSFileManager defaultManager] copyItemAtPath: @"/Library/MyFile.mp3" 
                                          toPath: @"/User/Library/AddressBook/Sample/MyFile.mp3" 
                                           error: &amp;error];
  </code></pre>
  
  <p>But I encountered an error that says `Operation could not be completed. No such file or </p>
  
  <p>directory`</p>
  
  <p><strong>I am working on a jailbroken iPhone.</strong></p>