T0biasCZe: Android MTP is extremely slow... so I made my own application with C# and ADB thats 28x times faster. Perhaps you may also find it useful... :D
Fast Android <-> Windows file manager using ADB protocol - T0biasCZe/AdbFileManager
I was getting tired of the mtp throwing errors half the time, the directories loading two minutes (not exagerating), the copying taking taking hour, so i said screw it and made my own file transferer that uses ADB, which doesnt rely on the slow as MTP. I made it primarily for myself, but since i already made it why not share it :D
From my testing (over USB 2.0) of copying 8.4GB pictures folder, with my app it took 4m08s, approx 286Mbits/s. With MTP, it was showing it will take hour and 3/4, aprox 10Mbits/s https://github.com/T0biasCZe/AdbFileManager/releases
edit: To go up a directory, double click the list header!
For me it doesn't work at all. It keeps losing the phone, unable to find it. I suspect it's some network rule or something with my custom DNS, but I cannot find specifically what it is.