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
- we can syncing the data one drive to SharePoint or SharePoint to One drive Bidirectional option.
- Timer Job to create the backup.
- 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