Backup Sharepoint Office 365 Page

The sys admin at my organization set up a SharePoint site using Office 365. I’ve created a new Page with some documentation which I would like to back up somehow. I’ve looked around and I’ve been unable to find any clear way (that corresponds to what I’m seeing on my version of SharePoint) to export, back up, off-board or save offline.

How can I backup or export a page or site in SharePoint Office 365?