I have 2 Garmin's both with an extra 32GB card. The US only one updated easily. The other 3490 which has the Europe maps on the SD is not updating the US maps that are inside the unit.
I get a message
"We're unable to install the updates."
The latest version of these maps have so much new information that we're not going to be able to fit it all on the device's internal memory.
There is no prompt to install it on the external memory.
File size 6.09GB
Garmin 3490 memory 65% full, 2.72GB free
Isn't the update suppose to delete the old maps and install the new ones?
How to fix this problem, using latest Garmin Express sw.