Ok, is this an attempt at manual labor right now, or is this a test of lesson for school? If it is work, related, as an IT person, if I were to program a task such as this, then I will do it for your boss, not you. If this is school, then you need to do your own work.
Either way, really, you need to do your own work.
"Why do you answer me like this, Mark?"
Here is why I shy aware from this type of solution offering: Because the scope is RARELY described 100% of what is needed, and if not deployed right, or understood, you delete every file that you have access to, and blame us for our solution.
There are plenty of resources out there that will describe file accessing and subfolders on MS site. Here is a good start:
HEre is a start, it is the FOR command. This will start you on LOOPING through folders. After you verify you find the files you want to delete, go ahead and venture further into the other BATCH commands!