If you want to select all files in the folder to be copied, press together the keys: Ctrl + A; Press Ctrl + C to copy the files; Go to the destination folder ...
These four ROBOCOPY commands will accomplish what you want. From Command Prompt, run: robocopy C:-Users-John-Downloads-Source C:-Users-John-Desktop- ...
Open the folder containing the file you want to copy a file into multiple folders. Right-click the file and select Copy. Then, go to each target folder, right-click, and choose Paste. Repeat this copy a file into multiple folders again.