Use robocopy to copy a directory structure and preserve the date modified of directories:
robocopy "source" "destination" /B /E /COPYALL /DCOPY:T
eg:
robocopy "D:\Data" "E:\Data" /B /E /COPYALL /DCOPY:T
/B :: copy files in Backup mode.
/E :: copy subdirectories, including Empty ones.
/COPYALL :: COPY ALL file info.
/DCOPY:T :: COPY Directory Timestamps.
it didn't worked every time in robocopy so I had to stop using it, it gave erros which were hard to solve. Now I am using GS Richcopy 360 which provides this feature and using it I can automate this task also. Give it a try, thank me later.
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