"The USB media was changed. Do not change the USB media while it is being read." message appearing on the LCD.
What does it mean and how do I clear it?
The USB media was attempted to change while it is being read.
Please try again without disconnecting.
If the start/stop button is pressed while the machine is not correctly set up or if an incorrect operation is performed, the machine stops and informs you of the error with a buzzer and an error message.
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