Steps:
1. First, add a new "library" in "Library" and click "Include a folder! Therefore, you must first enable the system's offline file function, in the "Start" search box to find "offline file", click on the results to open the management window, click on "Enable offline file". The first thing you need to do is restart your computer according to the system's prompts.
4. After the system reboot into the desktop, right-click to add the network folder, select "Always Offline Available", and then the first step of the add operation, and then add the network folder will be successful.
For more information, please visit the win7 system download site.