On my Garmin 3590LMT getting to the system folder was a lot more complicated. You have to get unit into Mass Storage mode first, then the windows folders settings work. From your main screen go into your master volume screen and touch and hold the top right corner of the screen. After about 5 to 10 seconds you will get the diagnostic page. Scroll down to and select MTP settings. Check Mass Storage then save and exit all the way out. You now have access to the missing folders. Wish I knew this before I did my first map update to 2015.10 as I would have liked to save the original 2014.10 maps since they still worked with my City Xplorer files. It seems that any later maps will not support the CityXplorers, pity.