How to export old emails to a PST file and save them locally or on an external drive

1. Open Microsoft Outlook and click on the "File" tab in the top left corner of the screen.
2. Click on "Open & Export" and then select "Import/Export".
3. In the Import and Export Wizard, select "Export to a file" and click "Next".
4. Select "Outlook Data File (.pst)" and click "Next".
5. Choose the email account you want to export from and select the checkbox next to "Include subfolders" if you want to export all the email folders.
6. Click on "Next" and choose a location where you want to save the exported PST file. You can save it locally or on an external drive.
7. Click on "Finish" to start the export process. This may take some time depending on the size of your mailbox.
8. Once the export is complete, you can safely disconnect the external drive if you saved the PST file there.

By following these steps, you can export old emails to a PST file and save them locally or on an external drive for future reference or as a backup. This will help you free up space in your mailbox while still keeping important emails accessible when you need them.