Edit: changed to a different USB stick and followed the advice from West Country Yokel above and it worked. Still doesn't explain why it went pearshaped all of a sudden.Today my USB port starting playing up. It isn't being recognised so I can't play music from a stick. Worked perfectly fine until now. Haven't touched the thing. Read through this thread, reformatted the stick to exFAT and the usb port said it didn't recognise the file format [but at least it recognised I had installed a stick]. Reformatted to FAT32 at Allocation unit size of 4096 but still no sign of it when I press the AUX button. I have a Nissan Note 2011 and am using a Kingston 4GB stick.