You can restore SharePoint Online documents to another SharePoint site.
By default, the existing files and folders are overwritten during the restore operation.
From the navigation pane, go to Protect > Office 365.
The Office 365 apps page appears.
Click the app that contains the documents to restore.
The app page appears.
On the Sites tab, select the sites that contain the documents to restore.
Click Restore, and then click Restore documents.
Select the documents to restore.
You can also search for a document from the Search box.
The Restore options dialog box appears.
From the Restore to list, select SharePoint.
Select Restore the data to another location.
To specify the location to restore the documents, in the Destination path box, click Browse, and then select a location.
Under Advanced options, do the following:
To restore the ACLs, select the Restore ACLs only check box.
To restore the workflow definitions and alerts, select the Restore workflow definition and alerts only check box.
To restore only the latest version, select the Restore latest version only check box.