USB connection only for charging not data transfer. How can I change mode? (Mate7)

Does anyone know, how to get this screen back ? I mean being able to choose between USB connection modes ?

When I first connect Huawei mate 7 TL10 to my computer , I unchecked "Always prompt me" and I choose charging only, I though , I will be able to find it somewhere in the settings , but I couldn't

Btw
I already clicked several times on "Build number" and got Developer options. HiSuite suggested , I should enable "USB debugging" I did it , but when I exit from Developer options and back , I find it back to disable !

any help will be appreciated

I got the image from this thread
http://forum.xda-developers.com/show....php?t=2621585
but since I'm new , I couldn't reply within the same thread