If your Gmail inbox is overflowing with years of messages, photos, and attachments, you are not alone. The free 15GB of storage that comes with every Google account gets consumed faster than most people expect, especially when shared across Gmail, Google Drive, and Google Photos. Sooner or later, you see the dreaded “Account storage is full” notification, which blocks you from sending or receiving new emails. While buying a Google One subscription is an option, a smarter, permanent, and free solution exists—but you need to act quickly.

Google has announced that it will discontinue support for the POP3 (Post Office Protocol) email transfer method later in 2026. New users already lost access in early 2026, and existing users will lose it by year’s end. POP3 is the most straightforward way to bulk transfer old messages from one Gmail account to another. Once it disappears, alternatives like IMAP or manual downloading become more cumbersome. Therefore, now is the perfect time to set up a secondary “archive” Gmail account and migrate all your digital clutter before the window closes.

Why Your Gmail Storage Fills Up So Quickly

The 15GB free tier is a shared pool. Every email with a large attachment, every photo backed up in Google Photos (if you choose “High quality” or “Storage saver” before June 2021, or original quality after), and every file in Google Drive counts against the same limit. A typical user who sends and receives photos or PDFs can fill 5–10GB within a couple of years. Once you exceed the limit, you cannot send or receive emails until you free up space or upgrade.

Deleting old emails individually is tedious. Many people have thousands of messages they want to keep for sentimental or archival reasons but never want to see again. The nuclear option—moving everything to a second free account—gives you a fresh start without spending a dime. The only cost is a few hours of setup time and patience while the transfer completes.

How the POP3 Transfer Works

Google’s POP3 feature allows you to connect an external email client—or in this case, another Gmail account—to download all messages from your primary inbox. By enabling POP on your main account and then configuring your new archive account to fetch those messages, you effectively copy every email (except drafts and spam) to the new location. After the transfer finishes, you can delete the originals from your primary account, reclaiming the storage they consumed.

The process is straightforward but has a few critical steps that require attention. First, back up your emails using Google Takeout—download your data to your computer or an external drive. This serves as a safety net in case anything goes wrong during the migration. Next, log into your original Gmail account, go to Settings, then Forwarding and POP/IMAP. Select “Enable POP for all mail” and choose “delete Gmail’s copy” under the “When messages are accessed with POP” dropdown. This option automatically removes the messages from the original account after they are retrieved, saving you the trouble of emptying the trash manually later—though you will still need to empty the trash folder.

Then create a fresh, empty Gmail account—your archive. Log into it, navigate to Settings > Accounts and Import > Add a mail account. Enter your original Gmail address, select “Import emails from my other account (POP3),” and provide the password. You will almost certainly need to generate a Google app password if your account uses two-factor authentication, which is recommended. App passwords are 16-digit codes created specifically for less secure apps or services; they bypass the need to share your main password. Go to myaccount.google.com/apppasswords, generate one labeled something like “Email Transfer,” and use it when prompted. Ensure you check the boxes for “Always use a secure connection (SSL)” and “Label incoming messages” and “Archive incoming messages” to keep your archive account’s inbox clean. Set the port to 995. Click Add Account.

After the accounts are linked, the transfer begins automatically. For an inbox with 75,000 messages, the process can take up to two days. During this time, you can continue using your original account for new emails, but avoid making changes that might interfere with the sync. Once the transfer finishes, you will need to manually empty the Trash folder in your original account, as deleted messages still count against storage until permanently removed. Clearing a large trash folder can take an hour or more.

What Gets Left Behind

Not everything moves. Drafts remain in the original account—you should decide manually what to do with them. Spam messages are automatically deleted after 30 days, so you can either let them expire or clean them out yourself. Also, any messages you had already deleted or that were in the spam folder before starting the transfer will not be copied. So it is wise to review your spam and trash folders before beginning the migration if you want to preserve anything valuable.

After the Transfer: Final Steps

Once all emails are imported, you can stop the automatic syncing by going to your archive account’s Settings > Accounts and Import and deleting the linked original account. This prevents future downloads. If you created an app password, revoke it from the Google App Passwords page to maintain security. Your original account is now nearly empty—its storage usage will drop dramatically. In one test, a 12GB inbox shrank to 0.66GB, with only 0.06GB from Gmail itself.

One important caveat: Google will delete accounts that remain inactive for two years. If you plan to keep your archive account as a long-term repository, log in at least once every two years to maintain active status. Otherwise, you risk losing all those transferred messages. The archive account itself also comes with 15GB of free storage, so it can hold a large volume of emails comfortably.

This method works best for people who want to keep all their old messages accessible while freeing up space on their primary account. It is not suitable for users who want to merge two active email flows permanently. But for those who have been avoiding inbox cleanup, the POP3 transfer offers a one-time escape hatch. With Google’s deadline looming later this year, now is the time to take advantage of it.

For anyone who regularly hits the storage cap, the process described here is the ultimate free workaround. It requires no paid subscriptions, no third-party tools, and no long hours of manual deletion. By setting up a second account and using POP3 before it disappears, you can effectively double your free Gmail storage forever—at least until Google changes the rules again.

Source: CNET News