To download, backup, and export Yahoo emails to your PC, begin by setting up access through an email client like Microsoft Outlook or Mozilla Thunderbird. Configure your Yahoo account in the client by enabling IMAP or POP settings in Yahoo’s account settings, which allow emails to be retrieved. Once connected, use the client’s export or backup options to save a copy of your emails locally. Alternatively, Yahoo Mail Pro users can directly download emails through the Yahoo interface by selecting individual emails or using a third-party tool for bulk downloads. Saving emails as PDFs or exporting as a .pst or .mbox file format are also reliable ways to keep a secure backup on your PC. Regularly backing up your emails ensures you retain access to important messages, even if there are connectivity issues or changes to your Yahoo account.