The *.VC.db files are Intellisense-generated garbage that definitely doesn't need to be committed to the Git repository.

First, since it seems like you already committed these huge files to your local Git repo, you need to fully purge them from your Git history. See this related answer to accomplish that.

After purging, you will want to force-push your newly purged branch to Github, to effectively purge Github as well.

Next, for an Unreal Engine project, make sure you set up .gitattributes and .gitignore correctly. See for example this Github repo which has some good settings that work for most UE projects:

https://github.com/XistGG/UE5-Git-Init

The .gitignore there explicitly includes a ton of stuff you DO NOT want in your UE5 Git repositories, including Intellisense-generated *.VC.db files.