OneDrive

OneDrive is a cloud file storage and synchronisation service that lets you store documents, photos, and other files with automatic sync across devices. It's built into Windows and integrates directly with Microsoft Office apps, so files saved in Word, Excel, or PowerPoint can live in OneDrive by default.

For personal use, it handles basic cloud storage and photo backup. For businesses, OneDrive for Business adds enterprise features like data loss prevention, advanced threat protection, compliance tools, and admin controls. The business version runs on SharePoint infrastructure, which means you get versioning, retention policies, and granular permissions.

The target market is broad. Personal users get 5 GB free with a Microsoft account. Business users typically access OneDrive as part of their Microsoft 365 subscription. It competes directly with Google Drive, Dropbox, and Box, with its main differentiator being deep native integration with Windows and Office applications.

Personal plans start with a free 5 GB tier. For more storage, the Basic plan offers 100 GB at roughly $2 per month. The Personal plan gives you 1 TB for about $10 per month, bundled with Microsoft 365 apps (Word, Excel, etc.). The Family plan covers up to six people with 1 TB each for around $13 per month.

For businesses, OneDrive for Business Plan 1 costs $5 per user per month for 1 TB. Plan 2 at $10 per user per month adds unlimited storage and advanced compliance features. However, most businesses access OneDrive through a Microsoft 365 Business or Enterprise subscription, which bundles it with email, Teams, and Office apps starting at $6 per user per month.

Important note for 2026: Microsoft is retiring standalone OneDrive for Business and SharePoint plans. No new customers can purchase them after May 2026, and existing contracts won't renew after January 2027 (though service continues until December 2029). Going forward, OneDrive business access will require a full Microsoft 365 suite subscription.

Vendor lock-in with OneDrive is moderate to high, but mostly because of the broader Microsoft ecosystem rather than OneDrive itself. Your files are portable. You can download them, sync them locally, or extract them via API in their original formats. That part is clean.

The lock-in comes from three areas. First, sharing permissions and metadata structures don't transfer to other platforms, so if you've built complex permission hierarchies, you'll need to recreate them. Second, if your organisation relies on the tight integration between OneDrive, SharePoint, Teams, and Office apps, switching storage providers means untangling those connections. Third, the retirement of standalone OneDrive plans means Microsoft is increasingly bundling it with the full 365 suite, making it harder to use OneDrive without buying into the broader ecosystem.

For businesses deeply embedded in Microsoft 365, this lock-in is a feature rather than a bug, as everything works together. For those who want flexibility, it's worth keeping your options open and ensuring your file organisation doesn't depend on Microsoft-specific features.

OneDrive is a product of Microsoft Corporation, founded in 1975 and headquartered in Redmond, Washington. Microsoft is publicly traded on the NASDAQ (MSFT) with a market capitalisation around $3 trillion as of early 2026, making it one of the most valuable companies on the planet. The company employs roughly 228,000 people.

Microsoft's financial trajectory is strong. Annual revenue hit $282 billion in fiscal year 2025, up 15% year-on-year, with cloud revenue alone reaching $169 billion. The company is profitable, growing, and heavily investing in AI across its product line. There is zero question about Microsoft's viability over a five or ten-year horizon.

OneDrive itself launched in 2014 (originally as SkyDrive in 2007) and has become the default cloud storage layer for Microsoft 365. It's tightly coupled with SharePoint on the backend, which is both a strength (enterprise features) and a complexity factor (the two services share infrastructure and API patterns).

OneDrive doesn't have its own standalone API anymore. All access goes through the Microsoft Graph API, which is Microsoft's unified gateway to data across Microsoft 365 services. This means the same API that accesses OneDrive files can also read emails, calendar events, Teams messages, and SharePoint sites. That's genuinely powerful if you need to integrate with multiple Microsoft services.

The API is mature and covers file operations comprehensively: upload, download, search, sharing, permissions, versioning, and delta queries for detecting changes. Large file uploads use a resumable session-based approach, which works well for files up to 250 GB.

Throttling is the main frustration. Microsoft intentionally doesn't publish exact rate limits for OneDrive and SharePoint, and the limits vary based on your tenant, the type of operation, and overall service load. When you get throttled, you get a 429 response with a Retry-After header. Starting September 2025, Microsoft halved the per-app per-user limit to prevent any single app from consuming a tenant's entire quota. Practically speaking, normal integrations won't hit issues, but high-volume data migrations or syncs will need careful rate management.

Webhooks are supported through Microsoft Graph change notifications. You subscribe to changes on a drive or specific folder, and Graph sends POST requests to your endpoint when items change. Subscriptions expire after about 30 days and need to be renewed. The notifications themselves are lightweight, telling you something changed but not what changed specifically, so you need to follow up with a delta query to get the actual changes. It works, but it's more involved than services that send the changed data directly in the webhook payload.

Getting your data out of OneDrive is straightforward at the file level. You can download files and folders through the web interface, sync them to your local machine with the desktop client, or pull them via the API. The API supports bulk operations and delta queries, so programmatic extraction of large file sets is feasible.

Microsoft also provides a data export tool through the privacy dashboard, and enterprise admins can use eDiscovery tools for compliance-related exports. Third-party migration tools from vendors like Movebot, ShareGate, and Quest handle cross-platform migrations (OneDrive to Google Drive, Dropbox, etc.).

The main portability concern isn't files themselves but metadata and sharing permissions. File metadata, sharing links, and permission structures don't transfer cleanly to other platforms. If you've built complex sharing hierarchies across your organisation, expect to rebuild those after migration.

Documentation is mixed. The Microsoft Graph docs are extensive and generally well-structured, with getting-started guides and API reference pages. But the sheer size of Graph (it covers all of Microsoft 365) means finding OneDrive-specific information sometimes requires digging. Developer reviews consistently mention that finding good, up-to-date examples can be difficult.

The testing story is a bright spot. Microsoft's 365 Developer Program provides a free sandbox tenant with pre-populated sample data, which is one of the best developer sandboxes in the industry. The Graph Explorer tool lets you test API calls interactively in the browser, which speeds up development significantly.

On the downside, Microsoft deprecated the Graph CLI and Graph Toolkit in August 2025, with full retirement planned for August 2026. Error messages during throttling aren't always descriptive enough to diagnose issues quickly. The authentication setup (Azure AD/Entra ID with OAuth 2.0) is powerful but complex, especially for multi-tenant applications. Overall, experienced developers will manage fine, but there's a meaningful learning curve for teams new to the Microsoft ecosystem.