Required disk space to install UE5 from source

Development Programming & Scripting C++
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1

Hi all!

I just had access to Epic console development and I’m trying to install UE from source for the first time. I followed all the steps, I cloned the repository from git, added the platforms I needed by copying them in the Platforms folder, launched Setup.bat first and then GenerateProjectFiles.bat.

After that the UnrealEngine folder was almost 160 GB on my disk and I still had around 60 GB left.

Then I opened the solution with Visual Studio by launching UE5.sln and started the build process.

Here is the issue. While building, Visual Studio quickly uses all my 60 GB left and I’m not able to finish the process due to lack of memory.

How much free disk space do I need to complete the process?

Thank you!

Luca.

2

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:

3

Thank you very much for your answer, I’ll try and post here the result, so that it can be useful for others, too!