The easiest way to download Gmail emails locally is to use an automated Gmail backup tool. The MailsDaddy Gmail Backup Tool is a simple and reliable option that lets you export your entire Gmail mailbox or selected folders into PST, MBOX, EML, MSG, or HTML formats with just a few clicks. It keeps all attachments, labels, and folder structure intact, making the process quick and beginner-friendly.

If you want a simpler method with multiple export formats, this guide explains everything step-by-step: https://www.cigatisolutions.com/blog/download-all-gmail-emails-to-computer/