SharePoint Online: How to take SharePoint Online Backup ?

 SharePoint Online: we have two types of the Service Scope.

• Service Backup- all the content is backed up on a regular basis in the case there is corruption 
• Deletion Backup- users will accidentally or purposely delete content. Its avaliable for 93 days only.

We can Requesting Backups from Microsoft raise the ticket.

• backs up content every 12 hours, and take a few days to restore, so depending on the urgency for getting the data

1. we can syncing the data one drive to SharePoint or SharePoint to One drive  Bidirectional option.
2. Timer Job to create the backup.
3. PowerShell to copy all the data local drive

https://techcommunity.microsoft.com/t5/sharepoint/sharepoint-online-backup-strategies-for-a-cloudy-day/m-p/225418