how to retain directory timestamp when copying between drives

It appears that robocopy will not preserve the date stamp
of a folder. However, you do the following:
1. Use robocopy to copy a folder, complete with subfolders.
2. Compile a list of all folder dates.
3. Use a "touch" utility to apply the folder dates to the target folder.

The batch file below will do just that. It makes use of
DirDate.exe, which you can download from
http://www.datamystic.com/buy/dirdate.html.
DirDate is not free but you might find other touch tools that are.

The batch file relies on drive T: not being used for anything
else. You must remove all # characters - they only serve to
mark the beginning of each line. Do not retype the file - use
copy & paste instead.

#@echo off
#set first=true
#set DDate=zzz
#set Source=d:\temp
#set Target=d:\New
#set TempFile=d:\dir.tmp
#set TouchTool=C:\Program Files\DataMystic\DirDate\dirDate.exe
#if exist d:\Touch.bat del d:\Touch.bat
#
#robocopy "%Source%" "%Target%" *.* /s
#
#subst T: "%Source%"
#dir T:\ /s /ad /tw | findstr "Directory .." > "%TempFile%"
#for /F "delims=" %%a in ('type "%TempFile%"') do call :Sub %%a
#subst T: /d
#
#subst T: "%Target%"
#call d:\Touch.bat
#subst T: /d
#
#goto :eof
#
#=============================
#:Sub
#set parms=%*
#if %parms:~0,3%==Dir set Dir=%parms:~13%
#if not %parms:~0,3%==Dir set DDate=%parms:~0,10%
#if not %DDate%==zzz (
# if not %first%==true echo "%TouchTool%" Date=%DDate% "%Dir%" >>
d:\Touch.bat
# set first=false
# set DDate=zzz
#)