Conditions for large files→
GitHub limits the size of files allowed in repositories, and will block a push to a repository if the files are larger than the maximum file limit.
Removing files from a repository's history→
To remove a large file from your repository, you must completely remove it from your local repository and from GitHub.
Distributing large binaries→
Some projects require distributing large files, such as binaries or installers, in addition to distributing source code.
What is my disk quota?→
GitHub tries to provide abundant storage for all Git repositories, although there are hard limits for file and repository sizes.