Hi guys,
Had a similar trouble with the ota update. After that i did download everything from the baidu.
Anyway to answer the last question, the chinese howto is pretty clear that u have to do it with a usb hub and 2 usb sticks, which is what i successfully did today and now everything seems to be working.
Only bad is the Win 10 in the File seems to be Chinese one language Version, not possible to change that to english….i wrote that in the teclast forum, hopefully they will on that….