Probably more of a rant than anything but trying to use the Explorer view in OneDrive for Business must be the worst IT experience I've had in a long time. It runs at dialup speeds half the time and under 1 Mbps the rest of the time.
Microsoft, you have got to sort this out. The forums are full of people complaining about the appalling WebDAV speeds they get trying to upload but the web client won't let you upload folders so you're stuck between a rock and a hard-place.
Tried un-ticking detect my LAN settings, looked for third-party software that will do it but still weeks alter no progress. If you're going to be a 'business' application then let people use it as they need to.
NB: The desktop Onedrive app is not suitable for this as it's copying files into another users shared folder that's taking the time.