Hi this is the solution to the issue with the USB Error.
I recently bought one of these head units and found that when I inserted a USB it comes up with a 'USB Error'. Well I searched on Google and found others with the problem but no solutions. So I played around and here is the solution that worked for me.
Try lots of different USB Drives. Mine started to work with the forth one I tried. The size doesn't seem to be the issue as I tried a variety of sizes both small and large. But the one that works is a old one I have had lying about for ages (512mb) so it maybe USB 1 it may not be but that is my best guess.
I have been using the USB almost exclusively now without any problems.
I have yet to try the SD MMC Card so I can't comment on how that works.
Hope this helps somebody out because this seems to be so far a great little stereo, if you can find a USB drive that will work with it.
If anybody still has the User Manual for this I would appreciate it.
Best regards
dunncha.
dunncha
September 2008