When somebody sends you a document as an attachment, don't just open it. Use the free tool Dangerzone to scrub it clean of ...
Those services do store files in the cloud, but they aren't designed to automatically protect all important documents, media files, and system files. Their strategy is generally to sync just one ...
That last one means that the cloud vendor automatically drops versions of a file or folder that are older than the time set by your IT administrator: any version older than six months, for example.