Microsoft OneDrive is a cloud storage and file-syncing service developed by Microsoft that lets users store files online and access them across devices. It integrates with Windows File Explorer and Microsoft 365 apps, offering features like Files On-Demand for saving local disk space, automatic photo and camera backup, file version history, and shared folders for real-time collaboration on Office documents.
OneDrive is aimed at individuals, students, and businesses who need reliable file backup and sync tied to the Microsoft ecosystem, particularly those already using Windows or Microsoft 365. Every Microsoft account includes 5 GB of free storage, while paid tiers bundled with Microsoft 365 subscriptions provide substantially more space alongside Office apps like Word, Excel, and PowerPoint.
The app is available on Windows, macOS, iOS, Android, and the web, with no official native Linux client. A Microsoft account is required to use the service, and the Microsoft Graph API allows developers to build integrations with files stored in OneDrive.