Cloud storage of files which can be accessed across multiple devices. The files can also be shared with users within organization or external users. OneDrive for Business cloud storage is available as part of Office 365 subscription or can be purchased as a separate solution.

Sync tool for syncing the files to computer, for offline access when we are not connected to network. Sync tool can be used to synchronize OneDrive for Business files and any SharePoint 2013 Team Site libraries  read More