you will need to look into the following class DirectoryInfo[^] I would particularly look into the exists method for checking to see if your directory exists, getfiles so that you can look at the files that exist in the directory as you will need to implement logic if the folder and files already exist. And as the other poster has stated you then need to look into File.Copy[^]
Lobster Thermidor aux crevettes with a Mornay sauce, served in a Provençale manner with shallots and aubergines, garnished with truffle pate, brandy and a fried egg on top and Spam - Monty Python Spam Sketch