The attached USB drive is not compatible with Lightning Server

Explanation:

The USB driver you have plugged could not be read by Lightning Server for unknown (and very rare) reason. 

Solutions:

• Unplug the USB driver and replug again.
• If you are using bus powered USB drive (without external power supply unit), please make sure it does not drain more than 500mA/5V power from the host computer or it won't work with any Lightning device.
• Change to another USB drive and try again.