So I got a 2gig micro SD card and it did not allow me to get the higher definition map for my lake. Worth a try.

Also, when I press the power button and then the (+) zoom button trying to take a screenshot, the unit goes off. I have tried to press them at the same time, press the power button and then the other one really quick after pressing power but it shuts off way too easy. REally frustrating. Any thoughts/advice?