I seem to remember using this back in the day but it seems to have disappeared from XP and Vista, is there an alternative? Xcopy works well for an incremental backup with the /s /d /y switch but I want my backup drive to mirror my source files meaning when I delete something it's also deleted from the backup, xcopy does not have this function. The Mirror command has exactly what I need, free and simple if only I could get it! Any suggestions?