Please don't send multiple emails (in multiple threads) about the same thing. Give people time to respond. Not everyone is active on a Sunday or in the same time zone as you.

I'm not sure I understand your questions, but I'll try:

Copy/paste is (as far as I know) unimplemented in explorer. Goal would be to make it possible to copy/cut files and paste them elsewhere.

Drag and drop refers to dragging a file and dropping it into another window, which then does something with it. For example, dragging a .ogg file and dropping it on a VLC player window, which then plays the file.