If you would like to use files where are at network share, you should be connected to access these files. If you aren’t connected/online, you cannot access your files. Actually, You couldn’t… Now, you can!
Using offline files gives you ability to connect your files at network share when you are offline. To activate this feature in Windows 7, right-click the file or folder, and then click “Always Available Online“. That’s all!
By the way, you cannot use that feature in Windows 7 Starter or Home Premium. You need to Professional or Ultimate. To see Windows versions comparison table, click here.