To use the Blackmagic Design UltraStudio Express, first connect it to your computer. But remember, you'll need to use your own Thunderbolt cable as it's not included in the package. Also, there's no Breakout Cable provided. When setting up, make sure your computer meets the necessary requirements. As for maintenance, keep it in a clean and dry place. Avoid exposing it to extreme temperatures or humidity. If you encounter any issues, check the connections and consult the official support for further assistance.