The fundamental step is to download and launch Yahoo Backup Software on your system.
Before taking the backup of Yahoo emails, you need to allow less secure apps. For this, follow the steps –
You will get a complete display of Office 365 database. All the folders with the number of messages contained by them are displayed on the software panel. Then, hit the Next button.
Select Yahoo folder for backup and then choose a file format (EML, EMLX, MSG, MBOX, PST, HTML, or MHTML) to save the backup results.
Use the Browse button and mention a destination path to save Yahoo emails backup. Move the mouse cursor to Process button. This will begin the backup task.