Required disk space to install UE5 from source

[Extrone (Arjun Subhash)]

The last time (about 2 years ago) I built from source, it was around 400 GB. Though there are ways to reduce it to ~100 GB.

Couple resources I found on how to reduce the build size:

Reducing the size of UE5 source build

The exact command is very simple. ./Setup.bat (in WIndows) ./GenerateProjectFiles.bat The most important: ./Engine/Build/BatchFiles/RunUAT.bat BuildGraph -target=“Make Installed Build Windows” -script=Engine/Build/InstalledEngineBuild.xml -clean -set:HostPlatformOnly=true -set:BuiltDirectory=“D:\\FoldernameWhereYouWantTheFiles” Before the last command ,edit the file Engine/Build/InstalledEngineFilters.xml and add this two lines: [Screenshot 2025-11-11 at 5.29.10 PM] I use dSYM because I’…

Alex 🦅

Alex 🦅

500×500 2.84 KB

Hi guys, here’s some useful information for those who care about download size and/or disk space taken by the engine dependencies. By default, Setup.bat always downloads files for your current platform: Win32 and Win64 if you are on Windows and Mac if you are on Mac. But you will also get dependency files for iOS and Linux even if you won’t need them. It also downloads HLML5 dependencies if you have Emscripten installed and Android dependencies if you have NDK. This is quite clever but what if…