code: public function copyFile($source, $target = null)
      {
          Helper::deprecate('2.0.0', '3.0.0', 'Use createLocalCopy() or createRemoteCopy() instead');
          if (!$target) {
              return $this->createLocalCopy($source);
          } else {
              return $this->createRemoteCopy($source, $target);
          }
      }
docs: Copy file
  
  @deprecated 2.0.0 Use createLocalCopy() or createRemoteCopy() instead.
  @param string $source CDN URL or file's uuid you need to copy.
  @param string $target Name of custom storage connected to your project. Uploadcare storage is used if target is absent.
  @return File|string
  @throws \Exception