China DOS Union

@echo off
set folder=%date time%
md "f:\%folder%"
copy e:\DataBak\*.* "f:\%folder%"
echo Backup complete.


Is there any error in the above batch file?
Why can't it back up into a folder containing the date and time?
Thanks!!

You can't use "%date time%.
You can only do it like this: "%date%%time%.
But even then it still won't work; you also have to filter out some characters. You also have to solve the problem of spaces in the filename.
Suggestion: search the forum, there are lots of posts like this.

Thanks for the guidance, but how come I can't find it? Could you explain it in more detail? Many thanks from your little brother here!!
I urgently need to use this at work.

To remove hyphens use %date:~-=%
To remove spaces, same idea: %date:~ =%
%variable:~str1=str2% replaces str1 with str2, and str2 can be empty

Also, if you only want to display a date like 20070416, you need to extract by position
Under 2000 use %date:~-10,4%%date:~-5,2%%date:~-2%, displayed result: today's date (in 20070416 format)
Under xp use %date:~0,4%%date:~6,2%%date:~-2%

Also, if the OP wants a different date format from what is extracted, you can rewrite it yourself; I won't go into that here