The Google Takeout tool is the most direct way to get your MBOX file. Export your data from Gmail - Google Help
To download your Gmail data as an , the primary method is using Google Takeout , a free tool provided by Google for exporting account data. MBOX (Mailbox) is a standard format that stores all your email messages—including attachments—in a single, large text file. Step-by-Step Guide: Downloading Gmail to MBOX mbox download gmail