Steam now allows you to copy games to Steam Deck and other PCs over a local network

Valve is giving Steam Deck users with slow internet connections or bandwidth caps a new way to install games on their devices. The latest Steam and Steam Deck betas add local network game transfers, a feature that allows you to copy existing files from one PC to another over a local area network. Valve says the tool can reduce internet traffic and lessen the time it takes to install games and updates since you can use it to bypass the need to connect to a Steam content server over the internet.