Today (around 1 am), I f'd up my navigation.
As you know, the 2019 navigation uses Gamin. It also includes 5 years of "courtesy" map updates. Well, last night, I downloaded the map from Garmin and installed it as per their directions. Everything went fine, I thought.
Turns out, while I can use voice commands to start navigating, it won't recognize any address or location. After saying any address, it's supposed to either respond that it recognized what you said or not... but now it just sits there, never responding to anything you say at that point.
At the moment, I'm downloading the data again, though it somehow recognized that half was already downloaded... using the same microSD card (in a usb reader/adapter). What's equally odd is that, despite having used that card to do the update already, it shows the map data as new for me.
We'll see how this works. If not, I'll try to see if I can find a plain usb flash drive... I should have a few somewhere.