The receiver was delivered very quickly. He is now running smoothly for about two months. So far, all USB drives were detected. Even an external wireless keyboard funktionier. The presence USB ports I could expand with a powered USB hub. The only thing that is not running satisfactorily, the recording perfectly. Most recordings was too early finished it always lacked so 1 to 2 minutes. Therefore, I have switched back and forth to each follow-up time 10 min.. The Receiver you can play a lot of file formats. I would buy it again