I dont think doing it in DOS will reduce time taken by much, if any. In fact, WinXP doesnt have DOS actually, it only emulates it. Therefore, I very much doubt if time taken will be less...
Given that, the command specified by pupupdada will not copy subdirectories and their contents. To do that, you should use xcopy
xcopy e:\aaa\. d:\aaa /e /c /h will help you achieve your task. /e forces subdirectory copy, /c will continue even if u have error, /h will copy hidden/system files also.
xcopy /? will give help on xcopy and list more modifiers to use...
Hope that helps,
Arun
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