If you're looking to back up your entire Yahoo Email, using a desktop email client or a professional AOL backup tool is the most effective option. Manual methods are only ideal for saving a few individual emails. Choose the method that best suits your needs to keep your AOL data safe and accessible—even offline. For a complete and efficient solution, I recommend the Migrate Cloud Data Yahoo Backup Tool. It allows you to back up AOL emails in various file formats such as PDF, PST, MBOX, TXT, CSV, HTML, and EML, and also supports direct migration to popular email platforms like Office 365, Gmail, Yahoo, Thunderbird, Hotmail, Amazon Webmail, and more.