To backupYahoo Mail emails to Gmail account directly, you can trust on theCubexSoft YahooMail Backup Tool that has capability to smartly backup Yahoo Mail toGmail account without missing any details. With the assistance of the software,users can convert unlimited emails from Yahoo Mail account to Gmail account atonce. It enables to save Yahoo Mail data with attachments, formatting, images,metadata, etc. With its free trial edition, you can save 25 emails from YahooMail into Gmail fro free. The Yahoo Email Backup Software isavailable for Windows & Mac OS so operate it on any given OS. https://www.cubexsoft.com/blog/how-to-backup-yahoo-emails-to-external-hard-drive/