It appears I've successfully transferred my 2008 map to my 2720 unit using the steps in post #3 (thanks). However, I have a couple of thinks not quite appear correctly. 1) When I look for the map version on the GPS (under Settings \ About \ Detail Maps) I get a screen saying "Failed to get map information!" 2) When I navigate a saved route that I transferred to the 2720 via Map Source (my usual method) after transferring the maps, it still says "The Route Does Not Match the Available Maps! It will not follow the roads precisely. Do you want to recalculate?" That error was the entire reason I was trying to update the map in the first place.

Is there still some map that I need to remove? Based on posts #22 and #30 in this thread, might this be related to not having the Flag=0?