When you drag-and-drop files
Dragging and dropping files between two open windows is a quick way to transfer files and folders. If the file or folder and both the original and destination location where you want to transfer it are visible, you can simply drag the item/items from one location to the other. Dragging is unlike moving a file of folder. Dragging from one disk to another copies the file/folder so that it appears in the two locations.
