MCU family
MCU_w111_UsbDeviceMountError
Unable to mount USB device filesystem
What does the MCU_w111_UsbDeviceMountError alert mean?
USB drive could not be mounted due to an error
What you'll see in your Tesla
- Unable to mount USB device filesystem
- Try removing and re-inserting USB device
Affected models
Model S 2012-2020
Model X 2015-2020
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Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.