Gmail Storage Full? Here's How to Fix It

Gmail gives every free account 15 GB, shared across Gmail, Google Drive, and Google Photos. When you hit that limit, two things happen: you stop receiving new email (senders get a bounce message), and Google starts nagging you to buy more storage. Neither is dangerous, but both are annoying, and the fix most people reach for — paying Google $1.99/month for 100 GB — only delays the problem. Your mailbox keeps growing, and eventually you are back here again.

Here is what actually works, in order of effort.

1. Find out what's actually using your space

Before deleting anything, see where your 15 GB went. In Gmail, search has:attachment larger:10M to find big attachments, or larger:25M for anything huge. You can also check one.google.com/storage for a breakdown by Gmail, Drive, and Photos — sometimes the culprit isn't email at all. Old Google Photos backups and forgotten Drive files routinely eat more space than a decade of email text ever could.

2. Empty Trash and Spam

Deleted email in Gmail doesn't actually free space until it's purged from Trash, which happens automatically after 30 days — or immediately if you empty it yourself. Open Trash and Spam from the left sidebar and click "Empty Trash now" / "Delete all spam messages now." This alone can recover a surprising amount if you've been deleting things and assuming they were gone.

3. Delete the actual space hogs

Sort by size using the searches above, and go through the largest attachments first. Newsletters with embedded images, old resumes with photos, video files someone emailed you years ago — these are usually the biggest wins. Deleting a hundred old text-only emails barely moves the needle; deleting twenty old attachments often does.

4. Pay Google for more storage

If you need speed and don't mind a subscription, Google One starts at $1.99/month for 100 GB. It's the path of least resistance, but it's also the only option on this list that doesn't actually solve anything — it just raises the ceiling. Your mailbox will keep growing at the same rate it always has, and in a few years you'll be looking at the 2 TB tier instead.

5. Archive locally, then delete from Gmail (the permanent fix)

The workflow that actually breaks the cycle: download the emails you want to keep to your own computer, verify they're all there, then delete them from Gmail's servers. Google's storage frees up, and you still have every email — searchable, on your own disk, with no monthly fee attached to keeping them.

This is exactly what MailVault is built for. It's a free, open-source desktop app for macOS and Linux that connects to Gmail over IMAP (with proper Google OAuth sign-in, no messing with app passwords), downloads each email as a standard .eml file, and organizes them in a Maildir folder structure on your disk. Once you've confirmed the archive is complete — open a few emails, search for one you remember, check an attachment opens — you can safely delete the originals from Gmail and reclaim your quota.

Unlimited manual archiving in MailVault is free forever. If you want it to run on a schedule automatically instead of archiving in batches yourself, that's a premium feature ($4/month or $25/year; 14-day free trial on yearly) — but for a one-time cleanup of a full Gmail account, the free manual archive is all you need.

Frequently Asked Questions

Related reading: how to free up email storage, how to download all your Gmail emails, and how local IMAP archiving works. See pricing or the FAQ.