BMW_X6M
RV-9A O-320 Catto Prop. Dual HDX, ADSB GTN650
I have 4 USB memory devices for the ChartData. I keep 2 in the airplane and have 2 to update/swap. During this latest round of updates, all 4 after the update, show the VFR Sectional Charts and the IFR Low Altitude Charts with an expiration date of Unknown on the device side, but with a valid expiration date on the computer side. I have restarted the update, and get the same result. The flight guide airport diagrams and the approach plates and airport diagrams sections are normal with the expiration date matching the computer. This is the first time this has happened. I have been updating these charts for about 18 months. :-/