Nearly every computer has a couple of USB (Universal Serial Bus) jacks that let you connect printers, scanners, external drives, and other perhipherals.
This standardized USB "A" plug is meant to make connecting devices quick and easy. Except it can be frustrating — you can plug the jack in only one way, and there’s no obvious way to tell which side is up. (Sure, some USB jacks display the USB logo on one side of the plastic, but not all of them.)
Here's the simple way to never insert a USB plug the wrong way again:
Watch David Pogue's 30-second video so you can make every USB connection a win: