OneDrive

Cloud storage and synchronization service that keeps files, photos, and videos backed up and accessible across desktop, mobile, and web. Integrates with the broader Microsoft 365 suite for real-time co-editing on Word, Excel, and PowerPoint, and syncs automatically across Windows, macOS, iOS, and Android.

Widely adopted by enterprises already using Microsoft 365 and stands out through deep integration with OneDrive for Business, SharePoint document libraries, and the Microsoft Graph API for programmatic access. The same Graph endpoints handle both personal and business drives, with Drive and DriveItem resources exposing uploads, sharing links, permissions, and shared-folder resolution.

Key capabilities:

• Microsoft Graph API for file access, uploads, sharing, and permissions from applications
• Personal Vault with multifactor authentication for sensitive files
• Ransomware detection and recovery for protected backups
• File picker control and SharePoint Framework for embedding storage in custom apps
• Office file handlers for custom preview, open, and creation flows

Developers use Microsoft Graph to add cloud file storage to applications, implement file handlers for specialized formats, or embed the shared file picker for OneDrive and SharePoint access. Teams rely on it for document collaboration, desktop and mobile backup, and cross-device file access within Microsoft 365.