IMPORTANT: Not all car stereo receivers have USB capabilities. To see if your car stereo has the USB function described in this solution, check the specifications or the supplied operating guide.
When you connect the USB device to the car stereo, wait approximately 20 to 30 seconds for the USB device to be recognized. If the USB device is still not recognised after 30 seconds, disconnect and then reconnect the USB device.
NOTE: To avoid any error messages, disconnect the USB device after the car stereo is turned off. For DSX-S200X and DSX-S300BTX models, do not leave the USB device connected to the TUNE TRAY after the car stereo is turned off.
If music still does not play back, the USB device may have too much information stored. The USB device will not work properly when full or almost.