Android File Server (AFS) is an Unreal Engine (UE) plugin that embeds a file server with your Android application when you package a Development, Debug, or Test project (or optionally a Shipping project, see below) build. As long as the file server is running, you can use the UnrealAndroidFileTool to manage, push, and view files. In builds that include AFS, Unreal Engine uses it for deploying Quick Launches. Together, AFS and UnrealAndroidFileTool are an alternative to using Android Debug Bridge (ADB), providing many of the same capabilities tailored to Unreal Engine's workflow.