Work with files everywhere: Store files, extend user experiences, and build business processes.

3. https://graph.microsoft.com
https://developer.microsoft.com/graph/graph-explorer
https://developer.microsoft.com/graph/docs/concepts/overview

5. Drive
DriveItem

13. https://apps.dev.microsoft.com

15. https://graph.microsoft.com
https://developer.microsoft.com/graph/graph-explorer
https://developer.microsoft.com/graph/docs/concepts/overview
https://officespdev.uservoice.com/ https://sharepoint.uservoice.com/