Did you check with the manual to see if the drive meets the formatting and size needs for the device? Also it may be a power issue, try using a powered USB hub or using a power adapter for the external drive if it has a power connection.
Did you check with the manual to see if the drive meets the formatting and size needs for the device? Also it may be a power issue, try using a powered USB hub or using a power adapter for the external drive if it has a power connection.