Do you Want to Move or Copy?

I got an interesting message from Windows when I was going to copy some files from a file server mount to a drive on a Windows server and got the following dialog:

Do you want to move or copy files from this zone? (Yes)(No)

I want to copy. So yes or no? Turns out the dialog was asking if I wanted to perform the action of move or copy (whichever action I envoked). It was not asking for me to choose from either move or copy.