Organization owners and team maintainers can add repositories to a team, as well as change the team's read, write, and admin access to the repository.

Warning: If you remove a person’s access to a private repository, any of their forks of that private repository are deleted. Local clones of the private repository are retained. If a team's access to a private repository is revoked or a team with access to a private repository is deleted, and team members do not have access to the repository through another team, private forks of the repository will be deleted.

  1. In the top right corner of GitHub, click your profile photo, then click Your profile. Profile photo

  2. On the left side of your profile page, under "Organizations", click the icon for your organization. organization icons

  3. Under your organization name, click Teams. Teams tab

  4. On the Teams tab, click the name of the team. Team page with list of teams

  5. At the top of the list of team members, click Repositories. The team repositories button

  6. Above the list of repositories, click Add repository. The Add Repositories button
  7. In the "Search by repository name" field, type the name of a repository, then select it. Repository search field
  8. If necessary, confirm your password.
  9. Optionally, to the right of the repository name, choose a different permission level for the team. Repository access level dropdown