Which tool to use to copy Windows Files between Volumes

Hi

I am getting a new Filer and I need to move the data between a Lun Volume and a new CIFS share, this will be on W2K3.

I have tried using robocopy but it's not copying archived files made by dxtender as unarchive files, basically the files are still archived on the new location but I can open them

Also the dxtender stub icon is copied across.

Anyone has any ideas about the tool?

Thanks, Ismael