USB-A Plug to USB-C Plug Adapter

via Adafruit
$10.05
SKU AF-5329

If your computer has a USB A port still, and you want a small, cable-less way to connect our modern USB C devices, this little dongle will do the job nicely. It's quite simple - you've got your USB A plug on one side, a C plug on the other. Since C is reversible, you can always plug in your board upright.

https://www.youtube.com/embed/setUUyJELZM?start=50