madeyouclickstudio

madeyouclickstudio / OneSync

Public

Lightweight, free Windows drive-letter sync for OneDrive and SharePoint - a free alternative to Cloud Drive Mapper, with accurate Explorer quotas, image thumbnails, live upload widget, and an in-app Recycle Bin viewer

dokan dotnet drive-letter education file-sync
13
1
85% credibility
Found May 19, 2026 at 23 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
AI Summary

OneSync is a Windows application that makes OneDrive and SharePoint appear as regular drive letters on your computer (like H:, I:, J:). Instead of the usual cloud-folder experience, you get the familiar drive-letter interface that schools and businesses have used for decades. When you install it, your cloud files show up as lightweight placeholders that only download their actual content when you open them — so a library with 500,000 files loads instantly instead of making you wait. The program is designed for schools and small organizations that want an alternative to expensive commercial tools, adding helpful features like accurate disk space info, working image previews, and a sync status indicator. It uses your signed-in Microsoft account for authentication and never sends your data anywhere except Microsoft's own services.

How It Works

1
💡 Hear about a free alternative

You discover OneSync through word-of-mouth, a tech blog, or a colleague who mentions it as a free way to get OneDrive and SharePoint as drive letters like schools have used for years.

2
📥 Download the installer

You grab the OneSyncSetup.exe from the releases page — a single file that installs everything you need in one click, no tech knowledge required.

3
🖥️ Install on your computer

You run the installer with admin rights, and OneSync sets itself up quietly in the background, ready to work with your Microsoft 365 account.

4
Set up your drives
🏠
Personal use

You just need your own OneDrive as H: drive — very simple setup

🏫
School or team

Multiple drive letters for different SharePoint libraries — everyone gets the same familiar letters

5
💾 Drives appear like magic

When you open File Explorer, your cloud storage is there as H:, I:, J: — real drive letters just like a network share, no more hunting through cloud folders.

6
📁 Browse and open files

Click into any folder and files show up as lightweight placeholders instantly, even if the library has thousands of items — content only downloads when you actually open something.

✨ Cloud storage feels like home

You can save directly to the cloud, see real remaining space, preview images without opening them, and everything stays synchronized — all while it feels exactly like working from a local hard drive.

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AI-Generated Review

What is OneSync?

OneSync mounts OneDrive and SharePoint libraries as native Windows drive letters, letting users access cloud storage the same way they've accessed network drives for decades. Built with .NET 8 and a Dokan filesystem driver, it creates placeholder files that hydrate on demand when opened. The project targets organizations, particularly schools, that want the familiar `H:` and `I:` drive experience without paying for commercial tools like Cloud Drive Mapper. It uses Microsoft Graph for all operations, authenticating via the signed-in user's delegated permissions with no client secrets required.

Why is it gaining traction?

The pitch is straightforward: you get drive letters, accurate quota display in Explorer, working thumbnail previews, and a live sync status widget. The technical differentiator is how carefully it avoids Microsoft Graph throttling. Token-bucket rate limiting caps each machine at 30 requests per second sustained, and lazy folder enumeration means a SharePoint library with 500,000 items costs nothing until a user actually clicks into those folders. For IT admins managing hundreds of concurrent users, this design prevents the login-storm problem that plagues full-enumeration sync clients. The freeware license removes the budget justification barrier entirely.

Who should use this?

Schools and small organizations running Microsoft 365 that want drive-letter access to OneDrive and SharePoint without per-seat licensing costs. IT departments tired of explaining `%USERPROFILE%\OneDrive` to non-technical staff. Environments where users bounce between multiple PCs and need cross-machine pending-upload visibility. If you're running thousands of seats across complex governance requirements, look at Cloud Drive Mapper instead.

Verdict

OneSync solves a real problem elegantly, and the architecture shows careful thought about Graph API constraints. However, with 13 stars and no source code published, the credibility score sits at 0.85% -- this is early-stage software from an unknown studio. The documentation is thorough and the deployment guide is production-ready, but proceed with caution: test thoroughly before rolling out to any critical environment. For smaller deployments where the cost of Cloud Drive Mapper doesn't pencil out, this is worth evaluating.

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