If you want to know how to turn on or Off Metered Internet Connections for sync settings in Windows 8 read this
If you are using a Microsoft account to sign in to your PC, running Windows 8, then you can able to sync your PC settings with your Microsoft account. Using this feature you can easily change settings of your other confirmed trusted PCs running Windows 8 with the same Microsoft account or Windows Live ID. That means if you change settings in one trusted PC, the effect will also reflect on other trusted PCs having same Microsoft account while Sync your settings is turned on.
Most of the wireless mobile broadband connections have usage limits. Windows 8 has its own usage counter to keep record of how much data the user has used through over the current billing cycle. In Windows 8 some applications also treat metered connections differently from non-metered or unlimited connection to reduce data usage such as fetching low-resolution preview images instead of high-resolution images, allowing a low-definition instead of high-definition video stream, or a header-only instead of full-sync of email.
If Metered Internet Connections option is set to off, then your PC will not sync settings with your Microsoft account while connected to a metered wireless connection.
Steps to Turn On or Off Metered Internet Connections for Sync Settings in Windows 8
1. First of all you need to be sure that your PC’s Sync settings is turned on.
2. Now, Open the Charms Bar by pressing (Windows + C) keys, and click on the Settings option. Or you can press (Windows + I) keys to open Settings Charms bar directly.
3. Next, click on More Settings option.
4. Metro Control Panel Window will appear. Select Sync your settings option in the left pane.