When comparing OneDrive vs Sync, the Slant community recommends Sync for most people. In the question“What are the best cloud backup services?” Sync is ranked 12th while OneDrive is ranked 19th. The most important reason people chose Sync is:
250% more space than Dropbox basic plan.
Specs
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Pros
Pro Full integration in Windows 10
Once setup OneDrive folder and local folders can be the same slowing for seamlessly integration into Windows OS.
Pro Collaboration via Office 365
If you use Office 365 with OneDrive, you can share a file to edit collaboratively in real time.
Pro Microsoft Office integration
It integrates with Word, Excel, PowerPoint, etc as if you were using OneDrive locally.
Pro Automatic photo uploads from phone
When Android, iOS and Windows Phone users shoot a photo with their phone it is automatically uploaded to OneDrive via app.
Pro Music file syncs with Groove Music
Music files put in the Music folder in OneDrive sync with Groove Music.
Pro No setup for Windows 8/8.1
If you use Windows 8 or 8.1, OneDrive is already built in your system and can be accessed via file explorer.
Pro 5GB of free storage
250% more space than Dropbox basic plan.
Pro Privacy conscious
Terms and conditions favor user privacy.
Pro Encryption
Data is fully encrypted on the client-side, both in-transit and at-rest.
Pro Two-factor authentication
Even free accounts offer 2FA.
Cons
Con Strictest code of conduct
Terms of Service forbid any kind of nudity, or that incites, advocates, or expresses pornography or racism among other things.
Con Becomes slower when it picks up a "Linux" user-agent
This may be intentional by Microsoft to force OneDrive users to use Windows. When OneDrive picks up a "Linux" user-agent it becomes slow whereas when from the same computer and browser it picks up a "Windows" user-agent it becomes considerably faster.