Question:Map settngs of my car radio can not be saved,have to re-set every time when turn on the andrio car dvd,such as map colour,speed alerts.What Can I do?
Solutions:There maybe two situations here.
First you need to check if other settings can be save such as radio setting,date and time setting.

If all these settings can not be saved then you maybe have pluged the Red ACC cable and Yellow memory wire(labled with B+) into wrong plug so there's no memory then the radio has no data to save.What you need to do is just to make them in the right plug.

If other settings can be saved,then maybe there's something wrong with the map card or the map app you may need a new SD card and ask your customer service for new map file.Copy the file into your empty new SD card and insert the SD card into the GPS slot.