Steve O. answered 06/26/19
Expert Apple Product Trainer - Macintosh, iPad, iPhone and Apple Watch
You'll need to use an external DVD burner. When you insert a blank disk, it will show up on your desktop and Open in Finder. Then you can simply drag files to it. When ready to burn (finalize) the disk, click on the Burn button (looks like a Radioactive symbol), and you can give your disk a name.