/**
  * Copy file into another file
  *
  * @param  string  $source     source file path
  * @param  string  $targetDir  target directory path
  * @param  string  $name       new file name
  * @return bool
  * @author Dmitry (dio) Levashov
  **/
 protected function _copy($source, $targetDir, $name)
 {
     $path = $this->_normpath($targetDir . '/' . $name);
     try {
         $this->dropbox->copy($source, $path);
     } catch (Dropbox_Exception $e) {
         return $this->setError('Dropbox error: ' . $e->getMessage());
     }
     $this->deltaCheck();
     return true;
 }