It doesn't include such switch because it preserves source file timestamp.

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>Indeed, the XCOPY command doesn't seem to include a switch to do this. You may need to search for an alternative tool.
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>One option might be a compression program: those normally have the options to preserve the original date/time.
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>Note that you don't need to compress; you can just "store". But the fact that you have to archive and then un-archive is an additional step which will make it slower.
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>Perhaps you can find another program, that includes this option. Might be worthwhile to look in www.download.com, or www.tucows.com.