synchronization for any local folder

For now, Proton Drive for Mac will only sync files to the cloud that are stored in the Proton Drive folder, but Proton says it’s working to enable synchronization for any local folder

Also, while Proton has open-sourced most of its apps through the years, allowing third-parties such as security researchers to inspect the underlying code, the Proton Drive Mac app isn’t yet open source — but the company says this will happen in due course.

And for Linux users, Proton has previously indicated that it will happen eventually, but it’s on its long-term roadmap.