Thanks, work well like TT GO on my Tab A Nougat and S7 edge Oreo both no root. In Tab A with ext sdcard I can see all relative directory structure then I can insert old POIs with icons to them. On S7 edge I have no ext sdcard only internal, I can see only one Files directory try to insert personal POIs but didn't work strange! Both can search POIs online in Thai too which can't do this on TT GO.