Just click properties of some file or folder and you will see “previous versions” tab.Here is quote from the help:
You can use Previous Versions in Windows Server 2008 to enable your users to access previous versions of files and folders on your network.
How do I restore a previous version of a file or folder?
Once you enable Shadow Copies of Shared Folders and start creating shadow copies, you can use the Previous Version feature to recover previous versions of files and folders, or files and folders that have been renamed or were deleted.
