Multiple Subfolder Creation

Sorry, no, this isn't a feature of Windows.

You can do it in the GUI, or write a batch file (with separate lines for all those several 100 folders) or spend a few hours (or more) to master VBscript and write a script to do it.

If there's any logic in the names of the several 100 folders, I think that writing a batch file would be the fastest way. Something like:

cd mainfolder
cd subfolder1
md Z
cd ..
cd subfolder2
md Z
cd ..
etc

Hope this helps


Kees

Windows do not like folders or files with the same names... hence the absence of any "support". It may save you a little time if you "copy" instead of "create", i.e. Use "Ctrl+C" once, then use "Ctrl+V" on each of the folders you want it copied to, rather than going to each folder and create a folder and name it "Z".
Using a batch file, you will need to write your 100's lines folder names. Either way, its time comsuming and take some effort. Maybe you need to think about why you need to copy the colder 100's times...