There is a software called winrar. It’s free. Go ahead and download it. Then simply install by doing next next. once you installed it you will be able to create .zip or .rar file like you create a new folder.
Then you will have new zip file. just double click and open it. drag and drop all the files and folders you want to send into the winrar window. and then you have all of those folders and files you’ve dragged into the window in your zip file. Just upload that zip as your delivery. then then buyer can unzip and use the exact same file/ folder structure you dragged into that winrar zip. That’s it.