You can take the help from the Yota Email Backup Tool to quickly backup Yahoo Mail emails to your PC. It lets you download all emails from Yahoo mail account at once along with the attachments. With this tool, you can export Yahoo emails to PST, PDF, MBOX, CSV, EML, and other formats. Moreover, you can transfer Yahoo emails to Gmail, Zoho Mail, AOL Mail, Outlook.com, Office 365, and any IMAP supported email services.

Steps to backup Yahoo Mail emails:

• Launch Yota Yahoo backup tool
• Click Open >Email Acocunts>Add Account
• Enter the credentials of your Yahoo Mail account
• Click Export and choose the desired format
• Hit the Save button to begin the process.