Each USB key is sent with the following instructions:
1. Remove the USB key from your previous update from your device and mail it in the pre-stamped envelope included in your shipment.
2. Turn off the unit using the on/off switch on the side of your device
3. Insert the USB key into the “USB update” slot on your SB-1 music device
4. Turn the unit back on
5. Wait for music to play
6. Leave the USB key in your device until your next update