Drag and Drop - Right Button - Copy or Move Dragging the icons with the right mouse button is the more cautious method because you are prompted to either Copy or Move when you drop the files/folders.

The combination of iOS 11 and iPhone X is pushing developers to reconsider many of their interaction paradigms and interface affordances that predated the Super Retina display and drag and drop ...

Letting go of the button is the drop part of drag and drop. For example, an icon of a file can be dragged and dropped onto the waste can icon for deletion or onto a printer icon for printing.