I connected my Android phone to my PC and I heard the USB connection sound but my phone’s storages weren’t detected (both Internal and SD card). I checked under Device Manager and noticed that MTP had a warning icon (yellow triangle) on it meaning it had somehow malfunctioned.
The i try solving the problem by Downloading MPT (Media Transfer Protocol) Porting Kit from Microsoft's official website yet it didn't solve the issue!
>>To Fix MTP USB Device Driver Problem
Go to Device Manager, under Portable Devices, right-click on MTP USB Device, and then click on Update Driver Software to update the MTP USB device driver.
>>Select “Let me pick from a List of device drivers on your computer”. The list will show installed driver software compatible with the device.
>>Select the driver you want to install and then click “Next”. Reconnect your mobile phone to your computer.
You will found out that is now working!!! :) don't forget to drop your experience in the comment box....