Hi there // Hello there!!
I'll explain you my bad experience nowadays. My phone is a Huawei Honor 7C (LND-L29) and i'm having some troubles with it. When I connect it to my PC, the menu for USB connection appears and I select Media Transfer. At this point all good, but the problem is that when I select it, phone automatically selects Charge Only... I've developer options activated and I've selected by default, use MTP but also happens the same thing, when I select it, this one returned to Charge Only...
Could anyone help me?? It's so sad to cannot transfer files via usb for this reason...
Thank you