Make files available when offline
Windows 95 introduced a feature called the Briefcase that provided the ability to synchronize a working copy of a file in the Briefcase with a copy on another computer such as a network server or the user’s desktop system. Windows 2000 expands on and simplifies the concept with the introduction of offline files. You can use offline files to work with shared network resources when you’re not connected to the network. For example, you might make a set of documents available offline while you’re out of town on a business trip, allowing you to continue working on the documents while you’re away. When you get back you synchronize the files with the server.