[WindowsCentral.com]

If you access the Internet using an Ethernet connection, and you have a limited data plan, use this guide to set your connection as metered on Windows 10.
Windows 10 is an operating system designed to take full advantage of an internet connection without any restrictions on how much bandwidth it uses to perform tasks, such as download drivers and updates, sync settings, connect with cloud services, let you get access to the World Wide Web, and everything else.

While this isn't a problem for many users, not everyone has an unlimited data plan to access the internet. Many users connect to the World Wide Web through metered internet connection plans, which most of the time have a limit on the amount of data they can send and receive.

Full story from the WindowsCentral blog...