I am trying to update the maps in the BMW Navigator IV which is 98% full. I added. 16G SD card which is recognized by Win10 as drive G. If try to update the maps, GE say that there is no space but do not prompt for the SD card. Allows me to install East region. After I try to chang map. Now GE offers to install the full map in the SD card. Memory card detected now. I agree, click continue and nothing happens ever ... odd behavior ...