My Z10 Pro Max does not see the files in the Wallpapers folder that I created in the external (USB dongle) and internal storage.
Firstly I created a folder with the name Wallpapers in my external USB dongle and placed a JPG file in it to be used as wallpaper, (USB dongle formatted using the RUFUS tool SAM advised in a specific topic).
When accessing the external storage folder Wallpapers it does show the folder, but it does not show any of the file(s) in that folder.
Same is true after I created a folder Wallpapers in the internal storage (using the file management tool found in the Market apps).
Before I had a Formuler Z8 box and there this all worked using the same tools, pictures, procedure, USB dongle....
Apparently the Z10 has issues accessing files in external storage and internal storage.
I created the folder Wallpapers with a capital W and without a capital w, with the same result, no files are shown inside that folder.
For instructions how to create the folder wallpapers see this tutorial: