RunUAT.bat BuildGraph -target="Make Shareable Installer" -script=Engine/Build/InstalledEngineBuild.xml -set:HostPlatformOnly=true -set:WithDDC=false
Administrators can copy the .item and manifest files located in C:\ProgramData\Epic\EpicGamesLauncher\Data\Manifests from a machine that has already downloaded UE 4.27. download unreal engine 4.27 offline installer
Save this file (approx. 3–5 GB compressed) to an external storage drive. Step 3: Set Up Offline Take your external drive to the target offline computer. RunUAT