MTP has never been well supported by Windows. This has led to Windows updates breaking MTP support about every couple months. Even forced driver updates often fail to fix the issue. Here is one possible solution for Window 10 users (have not tested it on other versions of Windows).
Open Device Manager
Connect watch to PC (you should see a device pop up in the list with an exclamation point)
Right click on that device
4) Select “Update Driver”
6) Select "Let me pick..."
7) Select "MTP USB Device" then "Next"
*Note
This has to be done individually for every device you are having problems with.
Title: Connecting watches KW88
Reaction MS
Now it occurred to me that it reads just … The last update brought the problem of invisibility second disk on which MS is working. But it is possible that support watch manufacturer already knows where the rub is ready with a response: awaiting repair MS updates. Then no choice but to wait for the repair update.
Název: Připojení hodinek KW88
Reakce
Ted mne napadlo, ze prece jen… Poslední aktualizace prinesla problém s neviditelnosti druhého disku, na kterém MS pracuje. Je ale mozne, ze podpora výrobce hodinek uz o tom vi, kde je zakopany pes a ma pripravenou odpověď: Cekame na opravu aktualizace MS. Pak nezbyva, nez na opravu aktualizace počkat.
EDIT
Does anyone drivers for KW88? link please I do not have a PC
make sure you have the drivers on your pc, and make sure before you do the settings go on your watch and choose mtp and then to the settings as written.
Oct 17, 2016 19:00:44 GMT 1janek said: Today i reflashed the watch and i can't connet to pc over MTP.
When i turn on the USB debug then TADAMM it's connect immedietly. It's a fool thing.
Sometimes I have to install the MTP drivers multiple times a day and am doing nothing more than transferring files. And it’s not just the watches either, but all my Andorid devices. Basically, Windows hates MTP and is completely stupid when it comes to USB. Think I’m joking, take a USB device and start plugging it into different ports, Windows will install a driver every time you switch ports.
6) Select "Let me pick..."
7) Select "MTP USB Device" then "Next"
