Microsoft OneDrive is a cloud storage, file sync, and sharing service. It provides:
- Cross-device access (web, Windows, macOS, iOS, Android)
- File synchronization (including “Files On-Demand” style placeholders on Windows)
- Sharing controls (internal/external), links, permissions
- Collaboration via Microsoft 365 (Office for the web/desktop coauthoring, version history)
- Consumer features (photo backup/organization, “Personal Vault” for sensitive files)
In B2B contexts, OneDrive is typically positioned as the “personal storage” layer in Microsoft 365, closely paired with SharePoint and Teams for team/workgroup content.