If lots of your OneDrive files get deleted, overwritten, corrupted, or infected by malware, you can restore your entire OneDrive to a previous time. Files Restore helps Office 365 subscribers undo all the actions that occurred on both files and folders within the last 30 days. Learn more at the OneDrive Help Center https://support.office.com/onedrive
1:07 Video ; Discover how Office 365’s integrated experience can help you start and grow your small business. Empower your employees with the tools they need to collaborate efficiently, communicate on the go, and access files with ease. Run your business with the Business Apps, allowing you to manage bookkeeping, customer scheduling, referrals and more.
Video: Understanding permissions in SharePoint
Are you confused about how permissions work in SharePoint? Controlling access to sites, libraries and items in those libraries is an important part of using SharePoint in your organization. This conceptual video explains the basic guidelines to follow when working with SharePoint permissions. You’ll get an overview of these guidelines, including how to creating unique permissions for sites, sub-sites, and libraries by breaking permissions inheritance.
For more information on SharePoint permissions see Get help with permissions in SharePoint.