I can do that with robocopy using the line robocopy C:1 C:2. This is the simplest way robocopy can be used. Before seeing each file dutifully copy over to Folder2, you'll see a banner. This banner is ...

If you've Vista and tried using the "improved" backup, you likely hate it. I hate it so much I switched to using Robocopy to get a selective differential "backup" (with ACLs), but anything in-use ...