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Navigate to the installation directory (usually C:\Program Files\Epic Games\UE_4.27 ) and copy the entire folder to an external hard drive or USB flash drive.

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Educational institutions can request access to a specialized offline installer that strips away the Epic Games Launcher. This is ideal for bulk deployments across multiple lab machines. You can submit a request via the Unreal Engine EDU Offline Request Form. 2. The "Portable" Method (No Installer Needed) download unreal engine 4.27 offline installer

If you don't have an enterprise account, you can create your own "offline installer" by utilizing a portable copy of the engine. This is the most popular method for individual developers. download unreal engine 4.27 offline installer