I would like to suggest you can also try ZOOK Yahoo Backup Software to backup Yahoo Mails to hard drive by saving Yahoo emails into various file formats. It is a straightforward solution for users which allows user to save multiple Yahoo emails to computer at once without losing any data.Directly Import Yahoo Mails to Gmail, G Suite, Outlook.com, Thunderbird, Lotus Notes, Windows Live Mail, Exchange Server, IBM Verse, Amazon WorkMail, etc. It Supports to all Outlook Versions i.e. Outlook 2019, 2016, 2013, 2010, 2007, 2003, etc. You can also test the FREE Demo edition which is available for users. This allows user to backup 25 items from Yahoo mailbox folders to selected saving format.
If you want to convert or transfer Yahoo Mail backup to MBOX file format then you can easily convert or transfer it. As you know there are many software and solution in markets as we know but, I suggest you one of the amazing reliable solutions for you to create Yahoo backup i.e. Yahoo Mail Backup Tool. Yahoo Mail Backup Tool allows the users to move the desired mailbox items to a specific location. To back up and download the data from the Yahoo account, users can choose any path from their system, and then all the data will be saved into that path. The location can only be provided by the users at the time of the saving process. Go to the link for more information mention above.