SharePoint and OneDrive look almost identical. They both store files in the cloud. They both sync to your computer. They both show up in File Explorer with similar icons. So why does Microsoft sell two products that seem to do the same thing — and which one should you actually use for what? Getting this choice wrong creates years of headaches. Let's make sure you don't.
The one-sentence difference
OneDrive is for your individual files. SharePoint is for your team's files.
Almost everything else flows from that single distinction. Read it twice. The rest of this article is just consequences of that sentence.
How they actually differ
| OneDrive | SharePoint | |
|---|---|---|
| Owner | One person (you) | A team or site |
| Default access | Private to you | Open to team members |
| If you leave | Files get deleted (after grace period) | Files stay; team continues |
| Best for | Drafts, personal notes, in-progress work | Shared documents, team libraries, project files |
| Permissions | Per-file sharing, mostly by you | Group-based, often managed by IT |
| Storage limit | Typically 1 TB per user | Up to 25 TB per site, plus 1 TB per license |
The "if you leave" problem
This is the single most important reason to put team files in SharePoint, not OneDrive. I cannot stress this enough.
When you leave a company, your Microsoft 365 account gets disabled. Your OneDrive enters a grace period — typically 30 days, sometimes shorter depending on policy — after which the files are deleted unless an admin actively retains them. Everything in your OneDrive disappears. Including the shared link your team has been opening every day for a year.
If those same files had been in a SharePoint site instead, leaving the company changes nothing. The site still exists. The files are still there. The team continues working. No emergency export, no panicked Friday-afternoon migration.
This isn't hypothetical. It happens at every company. Someone leaves. Two weeks later: "where did the budget spreadsheet go?" Nobody knows it was in their OneDrive. By then the grace period is closing and IT is scrambling to extract the files before they're permanently gone.
Don't let yourself be that person. Or that team.
Where the two work together
OneDrive and SharePoint share the same underlying infrastructure. What most people don't realize is that you can mount a SharePoint library inside your OneDrive folder structure, so it shows up next to your personal files but it isn't actually your file.
- Open the SharePoint site in your browser.
- Go to the document library you want.
- Click Sync in the toolbar.
- The library now appears in File Explorer under your tenant name (e.g., "Contoso - Marketing") rather than under OneDrive - Contoso.
Now you have both personal files (OneDrive) and team files (SharePoint) available in File Explorer, clearly labeled. Same sync engine, different ownership. Best of both worlds.
Decision rules
Use OneDrive when:
- You're the only person who needs the file.
- It's a draft you might not finish.
- It's a temporary working copy you'll archive elsewhere when done.
- It's personal: a resume, a presentation about a job interview, your private notes.
- You need to share with someone outside the org occasionally (OneDrive's per-file sharing is great for this).
Use SharePoint when:
- More than one person needs to edit the file.
- The work will outlive your time on the project.
- You want predictable, group-based permissions.
- It's a document the team should be able to find without you in the loop.
- You want version history that survives even if you delete the file.
The Microsoft Teams overlap
Here's a useful detail nobody explains: every Team in Microsoft Teams is backed by a SharePoint site. The "Files" tab in a Teams channel is just a SharePoint document library, dressed up in a friendlier interface.
This is the easiest way to use SharePoint without thinking about SharePoint. Create a Team for the project, drop files in the Files tab. They're now in SharePoint, they're team-owned, permissions follow team membership automatically. No manual setup needed.
If you've ever wondered "should I use Teams Files or SharePoint?" — they're literally the same thing. Use whichever interface you prefer; the files end up in the same place.
The migration trap
People often start a project by saving the file in their OneDrive, sharing the link with the team, working on it for months, and then realizing it should have been in SharePoint all along. Moving it later is more complicated than it should be:
- Existing sharing links from OneDrive don't follow the file when it moves. Everyone has to be re-given access.
- Permissions reset to the new location's defaults.
- Version history sometimes doesn't survive the move, depending on the migration tool.
- If the file was deeply linked from other documents (Word references, Excel external links), those links break.
The cleanest fix is to start in the right place. If a doc is going to be shared with a team, create it directly in the team SharePoint site or the Teams channel Files tab from day one.
Storage and quota differences
For an individual:
- OneDrive: 1 TB per user (sometimes more, depending on plan).
- SharePoint: shared across the tenant. Each site can use up to 25 TB. The total tenant pool grows by 10 GB per licensed user.
In practice, individuals run out of OneDrive long before organizations run out of SharePoint. If you're seeing "out of storage" warnings on personal files, consider whether the big stuff (department archives, project deliverables, old presentations) belongs in a SharePoint site instead.
External sharing
Both can share with people outside your organization, but the defaults are typically different:
- OneDrive is usually permissive — users can share their own files broadly.
- SharePoint is usually tighter — sites often have external sharing locked down by IT, especially for sensitive content.
If you need to share a file with a vendor and SharePoint blocks you, putting it in your OneDrive instead may bypass the restriction — which is exactly the kind of well-meaning workaround that creates the "if you leave" problem above. Better to ask IT to enable external sharing on the specific SharePoint site than to move team data to a personal silo.
The mental model that gets it right
When you're about to save a file, ask yourself this one question: "If I left the company tomorrow, would this file need to stay?"
- Yes → SharePoint.
- No → OneDrive.
That single question gets you to the right answer roughly 95% of the time. Use it consistently, save yourself a future migration project, and your team will thank you long after you've forgotten this article.
Even better — start now. Take five minutes today and look at where your most-shared files actually live. Anything in OneDrive that the team relies on? Move it. Future-you will be deeply grateful to past-you.