Map OK in Alpha 100 but says corrupt in Drivetrack 71, why?
Have several Alpha 100's all with same unlocked map cards, all good but none of those cards work in a new Drivetrach 71, why?
All help appreciated.
BTW, purchased a new Garmin Topo Australia & NZ V6 map and it's useless in the forest. The rivers and tracks are not named and the contour lines are so heavy and close together that all ...