Ahoy matey! Based on your question about USB upgrade for the Polestar media player, I see a few options that may suit your needs. The Solis USB Firmware Upgrade Stick for R1329 and USB To Can Converter For Giter Upgrade for R4801 both seem like they could help update the firmware or software on your Polestar player. The Ultra Slim USB Type-c & Type-a Usb-c External 6X Bd-re Dl Blu-ray Dvd+-rw Burner Player for R310 might be a good option to add more playback functionality too. Apologies that I don't have direct access to the Polestar product itself, but I hope these related items are somewhat helpful in your upgrade search! Let me know if you need any other recommendations.
