I've been looking for this problem for a long time these days. I originally set up an 8G card, but the navigation didn't work properly. I tried for a long time, and finally realized that navigation only supports 4G memory card, but the memory card is only 3.6 G, and the space for putting it into the memory card after Kailide lost weight is only about 70M, so it is impossible to save the settings. Today, I saw the answer from the first floor and decided to lose weight again, leaving about 140M space. I went downstairs and got on the bus to try it.