I am using the usb above for 3 months. I formatted it and it still works on windows, however i bought it for music in my car and my car system now gives me ERROR 23 its a Pioneer HF-XTOOBT it was working fine before the format. Please Help IF YOU HAVE ANY IDEAS. I have downloaded Formatter_v2.10.0 on my computer Win 7 Pro but it does not see the usb.