OneDrive is a cloud storage service by Microsoft that allows users to store files on its remote servers. Apart from user generated files, one ride can even be used to synchronize system files. You can think of it as a modern replacement for your my documents folder unless you choose to share them with someone else. All of the files you keep in OneDrive are private. OneDrive for business allows you to store and safeguard your files, share them with others, and access them from any device.