I last used my Nuvi 255 a couple of months ago in Europe with a map on an SD card.
But today, I turned it on and I no longer see most of the base map of the U.S. that was on the main unit when I purchased it. It shows the main routes/interstates, but all the streets are gone.
Installed Maps:
City Navigator North America NT 2010.10 Limited, Deluxe All Regions, Apr 09
It's fine if I "go" to Germany, using the SD card, but no sign of any detail in the U.S.
What could have happened to it? And how can I retrieve it?
Thanks.
--Kathy