The document provides instructions for saving files from a computer to a USB stick in 3 steps: 1) Left click on the file and select "Save As" from the dropdown menu, 2) Double click on the removable disk icon representing the USB stick, and 3) Click "Save" to save the file to the USB stick. It then discusses the portability, storage capacity, durability, and size advantages of USB sticks, as well as some potential downsides like different brands causing problems, risk of loss or damage, and eventual memory degradation.