All of my personal life – desktop and phone – is kept on Google Drive, which affords me amazing peace of mind!
I'm in the process of syncing all my work stuff onto Office 365, just because of how well it integrates with the Office desktop apps. If Microsoft would only add Google Drive as a storage service now...
Personal docs, photos, etc on OneDrive. All my personal systems are also imaged with Acronis Backup 12.5.
Company stuff is protected with Acronis Data Cloud, their cloud-based platform that supports local, cloud, and hybrid storage. Includes images of important physical and virtual servers. This is serious software for those serious about data protection. Milspec encryption and AI-based anti-ransomware included. Not the cheapest, but when it comes to backups and restores we've got to be sure the stuff works. It does.