You can save Emails as a Text Only, Outlook Template, Outlook Message Format, Unicode, HTML, and MHT file on your Windows PC. Learn how.

New Outlook: How to use offline mode and save emails locally In one of the latest Windows updates, Microsoft enabled offline functionality in the new version of Outlook ('Outlook (new)').

If there are any other folders inside Imported Folders–probably ones you created yourself on the old PC–you can simply drag them from Imported Folders to Local Folders.