Ok I've made some progress, I've loaded CN 2013, OSM maps for a 5 state area and topos from the GPS filedepot in Basecamp and have successfully transferred everything but the CN map to my 16gb SD card in the Montana. I initially installed the CN map into the internal memory before I bought the card. So now I'm wondering, should I move the CN to the SD card in case I have to do a hard reset? Seems like I read that somewhere in here. Do I keep a copy of CN on the internal as well or is it bad to have maps duplicated on the card and the internal memory?