If you use apersonal hotspot or tether your phone, you better keep an eye on your data usage.
Windows 8 lets you set a connection as “metered” to avoid unnecessary data usage.
To make this tweak, head to options > Change PC options > web link > Connections.
grab the data pipe connection you’d like to change, then toggle Set as Metered Connection to On.
How to Restrict & Monitor Mobile Data Usage on Windows 8.1| How-To Geek