Just upgraded from an older eTrex Vista to a new 60CSx. Tried to load a map set from Mapsource (v. 6.14.1) last night but it would not go using the "normal" way like I have done with the old Vista lots of times. Couldn't get past the window that says 'Erasing previous map data' (I left this running all night and this window was still there in the morning). After reading the manual, I switched the interface to 'USB Mass Storage' and was able to save the map set this way to the 60csx. Not sure if this is the right way to do it, but it worked and the maps appear to be functional on my unit. The maps I was loading are from the old Roads and Recreation and United States Topo. Do I need to upgrade to the latest Garmin map software for them to load the "normal" way into the 60csx? I plan to call Garmin about this but thought I would post something about it here first in case others have had this "issue".