Steps to Convert OST files to PST Manually
Run the Outlook App and click the File.
Select the Open & Export>> Import/Export option.
Choose Export to a file and click Next.
After that, opt for Outlook data file and tap Next.
Select the mailbox folders you want to export.
Set the location for PST and click Finish.

Regards,
Will

Follow the below steps to convert EDB to PST
Browse the offline EDB file that you wish to recover.
Select the mailboxes and folders for export.
Choose the location to save the exported data.
Click the 'Export EDB to PST' button to export the data to PST.

Regards,
Will