Which feature allows administrators to share files and folders easily with users inside and outside of the organization?

The ability to share files and folders easily with users both inside and outside the organization is primarily managed through Google Drive sharing settings. These settings provide administrators with granular control over how documents and folders can be shared, allowing for diverse sharing options such as restricted access, collaborators with edit permissions, or publicly accessible links. This flexibility ensures that content can be securely shared while still allowing collaboration with external users, which is essential in many organizational workflows.

The other features mentioned do not pertain specifically to direct file sharing across organizational boundaries. For instance, Google Docs settings focus on document-level permissions but do not encompass broader sharing functionalities across Drive. Google Groups settings are related to managing user groups for emails and collaboration but do not handle file sharing specifically. Google Vault is intended for data retention and e-discovery rather than managing access or sharing of files and folders. Therefore, it is clear that the Google Drive sharing settings are the most appropriate feature for the task of sharing files and folders effectively.