Answer:
You single click on a file to get the file "selected". Then you hit the command sequence "Ctrl + C" on Windows OS or "Command + C" on MacOS.
You can alternatively right click on a file to open up some options which includes Copy.
You then enter the chosen folder and click on the white space.
You can then do "Ctrl + V" on Windows or "Command + V" on MacOS.
Alternatively, you can right click and locate the paste option.
Explanation:
