China DOS Union

I read the moderator's tutorial, but I still don't really understand it. I want a few more detailed example scripts.
Please give me some guidance, experts.
For example, I want to delete everything on drive C except the WZ folder. No matter what it is. Delete it all! What would the standard syntax be like?
I also especially want to read a book about DOS commands, with an emphasis on batch files. Do any of you experts have any recommendations! If HELP can be offered.
I would be extremely grateful.

Create a batch file like this
_____________
@echo off
move c:\wz d:\wz
deltree /y *.* >null
move d:\wz c:\wz
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Your system needs to have two or more partitions,
and the free space on the second partition has to be larger than c:\wz.
In the current path there need to be these two files: move.exe and deltree.exe.