After completing the installation steps, you will find the interface showing folders present on your Opera account.

From the preview panel, select the folders from the tree structure you want to backup.

Double-click on the folder and then emails to preview the mail and their attachment files. Click Next.

Now, pick the saving option from the Saves/Backup/Migrate As drop-down options. (Say, we selected file format PST).

Check the Save in the Same Folder option to make the same source and destination folder.

Note: After selecting this option, the Path To Save button gets automatically disabled.

Opt to Remove Duplicate Mail to delete repetitive emails from selected Opera folders.

You can also exclude email attachments after choosing the Migrate or Backup Emails without attachments feature.

Select the Split Resultant PST feature to save output PST files into multiple smaller-size PSTs.

Apply Mail Filter to backup emails from a particular date range. Specify the Start and End date for migration.

Check the Custom Folder Name and define the name of the new output folder as per your choice.

Click on the Path to Save button to specify the Saving location for the new resultant PST file.

Click on the Convert button to initiate the backup of Opera emails into PST.

You can also download the Opera emails backup report by clicking on the Download Report button. Furthermore, to start the conversion again, select the Convert Again button.