Indeed. Verry strange. Everytime a add a random map or folder to the device, it is removed during the next startup. So i removed the gmapprom.img like you suggested to do. I sam it was removed from tree. After restart of the device, the gmpapprom.img was back in place. I do not understand. This should not happen. What can be the cause of this. I begin to realise that this is cause of the issue updating is impossible