Do the same with all duplicate video files (refer to steps # 18-20 above).Go back to Library, and click Videos | All Videos icon.Do the same with other duplicate files.Subsequently, specify you want to delete it from your hard disk and not just PlayList.Right-click any duplicate music file and press Delete. Add all partitions of your hard disk and click OK.Right-click Pictures and select Manage Pictures Library.Right-click Videos and select Manage Videos Library.Select a drive, say drive C:\ (you can add remaining drives as well).This opens up Music Library Locations dialog.Right-click Music on the left and select Manage Music Library.Click Apps icon and open the keyword from.You can do it either by adding all partitions or selected folders. The first thing you need to do is to add all files to your Library.