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Microsoft's OneDrive spots your mates, remembers their faces, and won't forget easily
(www.theregister.com)
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I've used veracrypt for years, starting back on Windows and I still use it since I moved to Linux. I don't use all of the features for it but what I have are encrypted volumes that exist on hard disks as a single file, which when opened with veracrypt, show themselves as a new disk in the system.
There's probably better ways to encrypt data on onedrive, but you could probably create one of those encrypted volumes to store on onedrive.