Been trying to backup my waypoints to sd card everytime I try to export it comes with the message that it has failed. Am I doing something wrong I switched to both slots and still no luck. I have a 1 mb card built in maps and I am interlinked to another chartplotter. Tried to get waypoints from the chartplotter 785ci and the same thing happened. thought it might be card but it reads fine on my home computer and HB software. Help me please!