I recently purchased an FR70 W. I have the latest Garmin Express installed (3.2.29.0). When I try to add the device in Express I get the error "FR70 Serial Number: This device is not compatible with Express". The correct device type (FR70) is detected but the serial number is not displayed. I've tried this on 2 different PCs with the same results.
I've performed troubleshooting steps listed on this forum such as (1) the Master Reset on the device and (2) confirmed there is no data in the Garmin/Devices folder.