In a document library, on the ribbon, click the Library tab and then, in the Settings group, click Library Settings.
On the Library Settings page, in the Permissions And Management section, click the Information Management Policy Settings link.
On the Information Management Policy Settings page, in the Library Based Retention Schedule section, click the Change Source link.
To make the Library tab available, you must have already navigated to a list or library.
Library and folder retention policy sources can be defined for the entire library or for individual folders in the library.
On the Library Based Retention Schedule page, in the Source Of Retention section, click Libraries And Folders.
In the pop-up message box that appears, click OK.
On the Library Retention Stage Configuration page, click Add A Retention Stage to add one or more stages.
Click OK.
After you have selected libraries and folders as the retention policy source, any content type policies that you define on the library are ignored.