How to Back Up Your Gmail and Move It Offline

Google gives you 15GB of storage for free — but that's shared across Gmail, Google Drive, and Google Photos, so for a long-time or heavy email user it fills up faster than you'd expect. Once it's full, Google nudges you toward a Google One subscription. It's genuinely cheap (a couple of dollars a month), but plenty of people would rather not add yet another subscription — and would prefer to own a copy of their email offline. To do that safely, you back it up first, then clear space.

Option 1: Google Takeout (the official export)

The simplest official route is Google Takeout, which lets you export all of your Gmail as an MBOX file you can download and keep. It's the cleanest way to get a complete archive of your mail in one go, and it's free. The catch: an MBOX file isn't the friendliest thing to browse — you'll want an email program to open it if you ever need to read those messages.

Option 2: A desktop email program (can be slow)

You can also connect a desktop email client — Mozilla Thunderbird (free), Apple Mail, or Outlook — to your account over IMAP, which downloads your mail onto your computer where it lives offline. This works and keeps things readable, but fair warning: if you have years of email and tens of thousands of messages, the initial download can be very slow and the program can feel sluggish while it churns through it all.

Option 3: A custom pull via the Gmail API (for big mailboxes)

For a really large mailbox, the fastest and most controllable approach is programmatic: a developer can use the Gmail API to pull messages down in bulk, save them locally, and then move them to trash to free up space — and it can be automated, including by an AI coding agent. This isn't a point-and-click option; it requires some programming. But for a huge archive it can be far quicker and more reliable than waiting on a desktop client.

Then — and only then — clear space

Once you have a verified backup, you can delete old mail (move it to Trash, then empty the Trash) to reclaim storage and dodge the subscription. Two cautions: confirm your backup actually opens and is complete before you delete anything, and remember that once Trash is emptied it's gone — Google won't get it back for you.

We can set up Takeout or Thunderbird for you, or build a custom API export for a large mailbox, back everything up safely, and then clear your Google storage so you're not paying for space you don't need.