Aryson Yahoo Backup Tool is the best tool to backup Yahoo mails to hard drive, PST, MBOX, EML, MSG, EMLX, PDF, etc. This tool is designed with powerful features that make conversion reliable and quick. It allows you to move all of your Yahoo email, contacts, calendar, Notes, Journals, and so on to any webmail account. Users can also remove duplicate email items from the selection and backup multiple emails in one go.