In order to move those duplicated files, here you have CloneMaster.
It is an application that can search all duplicated files on your PC, either if they are on a specific file or a set of selected directories, once it founds them it will make a report on every duplicated file so, according to its criteria and needs, it take the appropriate measures regarding this elements.
It is worth noting that many times they take up valuable space on the hard disk and even they make the system to run slowly (if they are huge files, among other things). CloneMaster works inmediately, when you click on the searching button; however it works safely and efficiently. You can mark the location where the checking process will be completed or letting it to do it automatically. It will compare all files, one by one, so not to leave any duplicate on the PC, when it finishes it will show up a list on the screen with all the copies, from there, all depends on you.
CloneMaster will sweep away, providing you set that, any duplicated file existing on you PC.