I am as computer literate as my stray cat that took up out back.I have the I finder H2O and a lowrance I way for the truck and aint got the foggest idea of how to load one of them sd cards with what I want on it..Oh,I also have the Mapcreate stuff too,two different ones..This stuff is confuseing considering the only computer I ever worked with was one that took up a whole warehouse room and had 71/2 inch tape reels on it..Any instructors out there????ss