If you're constantly getting alerts that you are at 14.9GB of your 15GB storage and Google is asking for $2 a month for a 100GB plan you don't really need, then you're probably feeling pretty defeated. The culprit is the Promotions tab in your Gmail inbox because these emails are typically filled with high-resolution tracking pixels, Product Hero images, and complex HTML. They are significantly larger than standard plain text emails.

Realistically, by using the select all conversations tool, a feature hidden in plain sight on the desktop version of Gmail, you can wipe out thousands of space-consuming ads in seconds. In 2026, Google wants storage notifications that feel like digital text. Most users assume their 15GB limit is being eaten by 4K photos or large Google Drive files, but the silent killer is often a decade's worth of high-fidelity image-heavy marketing emails.

Secret Select all feature

This feature comes in clutch but isn't available on the app

If you're someone that only uses the Gmail app, whether that's on iOS or Android, you probably won't even have access to this feature as it's designed for reading rather than auditing. When on a mobile, you'll find that you can only select 50 to 100 emails at a time, making a 10,000-email clean-up feel practically impossible or ending up being an all-day job.

In order to successfully wipe out multiple gigabytes worth of emails in one click, you must use a desktop browser or request the desktop site on a tablet to access the select all conversations link that actually clears the entire tab. It's very easy to make a mistake here. Most people click the select box and then hit delete, but this will only remove the 50 emails on the current page.

The trick here is to highlight the small blue text that appears after you check the select all box and then press "Select all [number] conversations in Promotions." Clicking this one link and then hitting delete turns a 200-page manual task into a single-click server-side command in the promotions tab. You are rid of hundreds, if not thousands, of emails you no longer need, which contain large, bulky files and expired links to deals that no longer exist.

After completing this task, I was successfully able to clear over 20,000 emails, some of which were over 15 years old, from my inbox and free up 10GB worth of space. While each email itself isn't very large, having tens of thousands of emails that are all 1 or 2MB each adds up pretty quickly.

You don't have to wipe them all out

Use specific searches to only get rid of what you want

If you're nervous about a total wipeout, then you can also target the biggest base offenders first. This means you'll just get rid of the absolute largest emails within your promotions tab rather than all of them. This will prioritize freeing up space for you rather than just completely wiping out your inbox. You can do this by using the search operator and specific commands.

Use category:promotions larger:5M to get rid of emails that are specifically over 5MB. These are usually those that contain large, high-res images and hero shots. Or you can use category:promotions older_than:1y to get rid of emails that are over a year old, which will ensure you keep hold of any recent vouchers or coupons you want to keep. Of course, you can adjust these commands based on the size that you want to delete and the age of emails that you'd prefer to keep.

It's worth noting that deleting 10GB of emails doesn't actually free up 10GB of space just yet. You have to remember the empty trash mandate. Google moves all of these deleted emails to a trash folder where they stay for 30 days and still count against your quota. This is just in case you realize you've deleted something you didn't want to, and you want to be able to restore it.

In order to get rid of this, you must manually go to the Trash label and click the Empty Trash Now icon to force the storage update. After this, it can still take up to 24–48 hours for the Google One storage meter to reflect the change, so don't be surprised if you're not seeing it immediately.

Once these emails have been deleted from your trash folder, they are gone forever and absolutely cannot be restored, so make sure you're certain you want to get rid of them.

Save yourself the money

You don't need to pay monthly for space you can clear for free

Before signing up for a monthly bill, maybe do an audit once every so often to get rid of emails you're digitally hoarding without even realizing it. Realistically, your email should be a tool rather than a storage locker for brands you haven't shopped at in over five years.

Another great step to take if you're finding that your storage is being clogged up quite frequently is clearing your promotions tab on a regular basis and also unsubscribing from brands that you no longer want to receive emails from because you know you won't be using them. Before signing up for a monthly payment or deleting precious photos, clear out all of those emails first.