OneDrive

OneDrive is the personal cloud file storage that comes with every Microsoft 365 user account. Each user gets their own OneDrive (commonly 1 TB on business plans) for files that belong to them rather than to a team — drafts, notes, personal working copies — with apps that sync those files to Windows, macOS, iOS, and Android devices.

Under the hood, OneDrive is built on the same engine as SharePoint, and the same co-authoring, versioning, and sharing controls apply. The practical rule of thumb: store personal working files in OneDrive, and shared team files in SharePoint or a Teams channel. There's also a consumer "OneDrive" tied to personal Microsoft accounts.