have a sony wx920-bt and wont accept usb that ive got the new firmware update on due to headunit issues but well headunit says file error, all say looks like this headunit be chuckee in aminuite
Have you tried resetting the system to factory settings?
I'd also try using a different USB drive as some of the ones I used before had some weird quirks making them not compatible with certain functions. So it's worth a shot.
