The Sync Center works with offline files and keeps them in sync. An offline file is a copy of a network file that is stored on your local computer for use when the network connection is not available. Before you can make a network file available offline, you need to enable offline files in the Offline Files utility in the Control Panel, where you can also set disk usage, security, and network options. When you make a network file available offline, the Windows automatically creates a copy on your local computer. Whenever the network versions are not available, the Sync Center opens the offline copy and then syncs it back with the network version when the connection becomes available again.
Change Offline Files Settings
Click the Start button, and then click Control Panel.
Double-click the Offline Files icon in Classic view.
Click the General tab.
To disable or enable offline files, click the Disable Offline Files or Enable Offline Files.
Click the Disk Usage tab.
To change disk space allocation for offline files, click Change Limits, drag the slider to adjust space usage, and then click OK.