Hey guys just wanted to drop this here. It appears that you can update your navigation maps for free on 2018+ expeditions/navigators. I don't know if its free every time or just a single free one, but I did it on my Expy and my MIL's Navigator. My maps went from 1 2016 to 1 2018. I don't ever use them but its nice to know that they are as up to date as Ford has for now. I did the download and transfer to USB option. The install does take a while once you put the USB in and you don't think it's doing anything, but it is. Just takes about an hour. I just left the ignition on run but not actually running in the garage and occasionally went out and checked on it.
Just go here and enter your information: https://syncnavigation.com
Just go here and enter your information: https://syncnavigation.com