Getting a USB Bluetooth adapter is a quick and easy way to allow your laptop or desktop to receive data via a Bluetooth connection. Bluetooth is one of the most common methods of file transfer for mobile devices barring the internet, and as such getting a Bluetooth adapter for your PC allows you to do so wirelessly should you ever find yourself lacking a connection. USB Bluetooth adapters are both small and incredibly cheap, meaning that there's little reason not to keep at least one or two of these useful little devices to be kept in the office or taken on any business trips where they might be useful.