A “storage full” banner is more than a nag. Google’s help page says that when your storage is full you can no longer send or receive Gmail, and messages sent to you are returned to the sender. Most of the space is rarely email text; it is attachments, old photos and files that share the same 15 GB. Here is how to see where it went and clear it without deleting anything you will miss.
Step 1: See what is actually using the space
Google’s account help says the free allowance is “up to 15 GB of storage,” shared across Gmail, Drive and Photos. Android phone backups can count as well, and Google’s Gmail help page notes that WhatsApp backups made on Android count toward the same limit. To see the split, Google says to use the Google One storage manager on the web or the storage page in Drive settings, and on a phone to open Drive, Photos or Gmail and tap “Manage storage” or “Clean up space” and then open usage details.
Check this before deleting mail. If Photos holds 11 GB, trimming Gmail will not solve the problem. Our post on Android backups using more Google storage covers the case where a phone backup is the culprit.
Step 2: Empty Trash and Spam
Google is explicit: until you permanently clear items in Trash and Spam, they count against your storage limit. Open each folder and clear it; Google’s help page mentions an Empty Trash now option in the notice at the top of Gmail. Emptying Trash is permanent, so look through it first for anything you deleted by mistake. If you are unsure, use the same logic as our guide on recovering deleted files: stop and look before the final delete.
Step 3: Find the big messages
Type these into the Gmail search bar. They are the operators Google’s own help page lists:
| Search | What it finds |
|---|---|
has:attachment larger:10M |
Emails with attachments over 10 MB |
filename:.pdf larger:5M |
Emails with PDF attachments over 5 MB |
older_than:2y has:attachment |
Emails with attachments more than two years old |
Start with the first one and sort by what you recognize: old video files, forwarded presentations, scans. For anything you might need later, save the attachment to your computer or an external drive first, then delete the message. Select the messages and delete; then empty Trash again, because deleted mail stays in Trash and still counts. Google notes that after you delete a lot at once, the storage figure can take 48 to 72 hours to update, and that it is worth waiting about 30 minutes before trying advanced cleanup if you are still full.
Which cleanup is worth the effort?
| Action | Effort | Typical payoff | Risk of losing something |
|---|---|---|---|
| Empty Trash and Spam | 1 minute | Depends on how long since you last did | Low, if you glance first |
| Delete large-attachment mail | 10 to 20 minutes | Often the biggest single Gmail gain | Medium; save attachments first |
| Clean Drive: large files, old duplicates | 15 minutes | Large if you sync folders | Medium |
| Review Photos storage | Varies | Often the largest share | High; photos are hard to replace |
| Delete old phone backups | 5 minutes | Can be several GB | High if the old phone is gone |
| Buy more storage | 5 minutes | Immediate | None, but it is an ongoing cost |
The payoff column describes patterns, not measured figures: the only way to know is to look at your own breakdown in Step 1.
The Google One storage manager
Google’s Google One help page describes a more guided route on a computer: go to one.google.com and click Storage, then under “Get your space back” click Free up account storage. Under “Clean up suggested items” or “Clean up by service,” pick a category or service to review, select the files, and click Delete. For Drive items, the last step reads Permanently delete, and Google asks you to confirm with a checkbox first; for Google Photos the step is labeled Move to trash. For Photos you can download files before removing them. Treat the confirmation wording as a stop sign: if the button says permanently delete, you cannot undo it. The page does not say how long Photos items stay in trash or list what counts toward storage; it points to a separate Google article for that.
Drive and Photos, the quiet bulk
Google’s storage page says that on a phone you can reach cleanup tools from Drive, Photos or Gmail; use usage details to see which service holds the most before you delete anything. If you moved to a new phone and let Google Photos copy your whole library, the photos you thought you were backing up now compete with your mail for space; see our phone-switching checklist, where iCloud photos moved through Google Photos count against the same quota.
What happens if you do nothing
Google’s page lists what stops when you are over your limit: you cannot upload new files to Drive, back up photos or videos to Google Photos, or create new files in Docs, Sheets and Slides, and Gmail sending and receiving may be affected. You can still sign in. The policy with real consequences is the two-year rule. Google says that if you are over quota for two years or longer, content in Gmail, Photos, Drive and Android backups may be removed, and that it will contact you at least three months before content becomes eligible for deletion, through email and in-product notices. Before that point you can buy more storage, remove files or download your content. The over-quota policy does not apply to Google Sites, Keep, Blogger or YouTube; a separate inactivity policy covers accounts that go unused.
Do not click your way out of a “storage full” email
Real warnings appear inside Gmail, Drive and your account’s storage page. A message that arrives by email or text, urges you to act within hours and links to a payment page is a standard phishing format. Open storage from your account, not from the message. The same rule applies to any account warning: go to the service directly.
A cleanup you can repeat
- Once a quarter, empty Trash and Spam.
- Run the large-attachment search and delete what you do not need.
- Unsubscribe from bulk senders so the problem does not refill.
- Review what Photos and phone backups hold.
- If you keep hitting the limit, a paid plan may be reasonable, where available through Google One.
Two situations, two plans
Your inbox is blocked today. You need space fast. Empty Trash and Spam, search for large attachments, delete the clear winners and wait. If the banner stays, Google’s page says the figure can take 48 to 72 hours to update, so a short-term fix is to free as much as you can and then check back the next day. Mail sent in the meantime may bounce, so tell anyone waiting on an important message to try again later.
It is creeping up and you want to stay below the line. Spend half an hour on the large-attachment search, move the keepers to local storage or a drive you control, and set a reminder. For a family account that shares photos and files across several people, look at the breakdown by service first; one person’s phone backup can account for a surprising share.
Sources
- Gmail Help: Free up Gmail storage
- Google Account Help: Storage limits and what happens when you’re over
- Google One Help: Clean up and fix issues with your Google storage (computer)
Checked against Google’s help pages on October 30, 2026. Google can change storage policies and menu labels.