Packet is a tool that allows users to transfer files from a Pop!_OS Linux desktop to an Android device over the same wireless network. It works with Quick Share and requires a Linux distribution with Flatpak support, an Android device with Nearby Share enabled, and sudo privileges on the Linux machine. The installation involves executing a command in the terminal, toggling the Static Network Port option to 'On', and ensuring port 9300 is open on the firewall. Files received on the Linux desktop are stored in the ~/Downloads folder, which can be customized.