How to avoid copying files that exist at dest?

Does anyone know how, or a program which can, copy only those files which don't exist at the destination? I was just trying to copy files from one drive to another overnight, and the transfer failed because my antivirus decided there was a virus in a jpeg. Now 75% of the files are copied, and I'd like to pick up where it left off rather than letting it copy for hours again.

Can't you just do it again and when it says "this already exists, overwrite" click No to All? Failing that look at XCopy32 in a batch file with the various useful flags that can be set to overwrite or not overwrite files.

http://www.snapfiles.com/get/SyncBack.html

With what Grey said, you might have to hold Shift (or was it Control) and click "No", if there isn't a "No to All" option - there sometimes isn't.

Yes I was worried there might not be. So this Shift or Ctrl does it to all dialogs as the reoccur then? That's amazing and the best tip I've got all day.

What other tips did you get today then?

;o)

Actually I think I did get some good tips today as well but that one is cool from an ultra geek point of view.

I used SyncBack, it seemed to do the job. I didn't trust explorer to do it right even if I told it to do it to all, because I've gone that route before and explorer always seems to screw it up when it asks me if I want to do something for all files, and it ends up stopping in the middle to ask me if I want to do it for some other file or something.

You can also use RoboCopy.exe by Microsoft. It can mirror a folder from one place to another, so it will not copy what is already there... I use it in a scheduled task to mirror my development folder to another drive.

Check out SS64.com for the robocopy syntax. You can download it from several places.

Can't Xcopy do the same thing which is already in windows so they're will be no problem.... Or maybe I am wrong.