Why doesn't data copy to the USB flash drive?

This is likely a problem with the USB flash drive, rather than a problem with the Hovermap. Check the following details for the USB:

• It has adequate free space.
• It is exFAT formatted.
• There is no damage to the USB port or connector.
• Try using a different USB device.
• If other devices work, wipe and reformat the problem USB flash drive.