Set Up a Metered Connection in Windows 10
If you're using your mobile phone as a Wi-Fi hotspot for your Windows PC, or just trying to stay within a data cap from an internet service provider, you'll want more control over what things get downloaded and when.
First of all, you can easily see in Windows how much data you've used. In Control Panel --> Network and Internet, there's a data usage tab. This will show you how much data has been used and which apps have been using data.