What's actually full? A one-minute diagnosis.

Last reviewed: September 23, 2026 · Markdown version

Answer one to three questions and land on the fix for YOUR storage problem — including the ones our app can't fix. A full Google account can be full of photos rather than email, and deleting the wrong thing can cost an afternoon and barely move the bar.

The whole tree is below — the questions, every branch, and where each one lands. Read it straight through if you'd rather not tap.

Question 1 — Where did the warning appear?

"Storage full" can mean two completely different things: the physical space on your phone, or the cloud storage of your Google account. Google says "Each Google Account includes up to 15 GB of storage, which is shared across Gmail, Google Drive, and Google Photos" (How your Google storage works, Google One Help, read 23 September 2026). The phone and the account are measured separately, so find out which one is full before you delete anything.

→ On the phone itself (iPhone/Android storage settings, "Storage almost full")

It's device storage — a different system from your Google account. Check it in Settings. On iPhone, Apple's steps are Settings → General → iPhone Storage, which shows "recommendations and a list of apps with their storage usage"; for a "Storage Almost Full" alert Apple suggests checking those recommendations or removing "some content, such as videos and apps" (How to check the storage on your iPhone and iPad, Apple Support, read 23 September 2026). On Android, Google's steps are to open the Settings app and tap Storage, with a note that some of its steps "only work on Android 14 and up" (Free up storage on your Android device, Android Help, read 23 September 2026). Clearing your Google account is a separate job, and not the way to fix this warning.

Full check, both systems side by side: Is it your phone or your Google account that's full?

→ In Gmail, or from Google ("Your Gmail storage is X% full", or the account storage bar)

That's your Google account's shared storage. On the warning we have seen, the headline named Gmail but the percentage was the whole account's shared storage — and on that account Gmail was the smallest of the three slices. The name on the warning does not tell you where the space is. Carry on to Question 2.

→ Not sure

One minute of checking saves an afternoon of deleting the wrong things: open one.google.com/storage for the account, and your phone's own Settings → Storage screen for the device. Which screen shows the problem is the answer. The two-screen check, step by step: Is it your phone or your Google account that's full? Then carry on to Question 2.

Question 2 — Open one.google.com/storage. Which product holds the most?

Open it in the account that got the warning. It shows one bar with the exact split: how much is Google Photos, how much is Gmail, how much is Drive. That split is the whole diagnosis. Whatever product holds the most space is the one to clean.

→ Google Photos

Photos is the culprit, and an email cleaner cannot help you here. The fixes live inside Google Photos itself and they're free: photos.google.com → Settings → Manage storage → Recover storage converts your already-backed-up photos and videos to Storage saver quality — photos above 16 MP are resized to 16 MP, videos above 1080p become 1080p. Google adds that you "can only recover storage once a day" and that some items "may not be compressed", and its page does not say the conversion can be undone, so treat it as one-way (Choose the backup quality of your photos & videos, Google Photos Help, read 23 September 2026). Then empty the Photos Trash: Google says deleted items "will stay in your trash for 30 days before they are permanently deleted" (Delete photos & videos, Google Photos Help, read 23 September 2026), and until then the cleanup isn't finished.

Full walkthrough: Google Photos is eating your storage

→ Google Drive

Drive tells you where the space is. Google's instructions: "On the left-hand menu, click Storage. Your files automatically list from largest to smallest." The same page points at device backups and hidden app data as "other storage" worth checking (Manage your storage in Drive, Gmail & Photos, Google Drive Help, read 23 September 2026). Work down from the top, then empty Drive's Trash: "Files in your Trash still count towards your storage until they are permanently deleted", and Drive deletes them for good after 30 days (Delete files in Google Drive, Google Drive Help, read 23 September 2026).

Full walkthrough: Google Drive is full

→ Gmail

Email really is where the space is. One more question — Question 3.

→ Can't check right now

Then take the general playbook. Start by emptying all three Trashes — Gmail (with Spam), Drive, and Photos each keep their own, and Google's storage page calls emptying them "the quickest way to recover space". After that: Storage saver if it's Photos, large attachments if it's Gmail, biggest files first if it's Drive. All of it free.

The playbook: Google storage full — what actually works

Question 3 — Is your account already bouncing incoming email (senders getting errors)?

→ Yes, mail is bouncing

Fastest safe recovery first. Google's storage page lists what happens when an account hits its limit: "You can't send or receive emails. Messages sent to you go back to the sender." (Manage your storage in Drive, Gmail & Photos, Google Drive Help, read 23 September 2026). So this is worth fixing fast, and worth fixing right — confirm storage is really the cause at one.google.com/storage, then work the recovery order. One thing to expect afterwards: messages sent while the account was full were returned to their senders, so important correspondents may need to resend.

The recovery order: Gmail can't receive emails? Check your storage first

→ No, mail still arrives

Email really is your problem — and it's the one this app is for. In order:

1. Empty Gmail's Trash and Spam first. The same Google page: "Until you permanently clear items in these folders, they count against your storage limit." Emptying is permanent — once a message is deleted from Trash, "you can't recover the message" (Delete messages in Gmail, Gmail Help, read 23 September 2026) — so glance through Trash first if you've recently deleted anything you might want back.
2. Then hunt the large attachments. Google's advice is to "Find and delete one or two emails with very large attachments you no longer need", starting from has:attachment larger:10M. The Query Builder writes searches like that for you; then delete downward from the biggest.
3. Then deal with the bulk — the years of promotions and updates that cost less space each but make a mailbox unmanageable.
4. Then be patient with the number. Deleted mail keeps counting until it leaves Trash, and after a big deletion "it normally takes up to 48–72 hours for Google's systems to accurately update the storage space" (the Google One page linked under Question 1). More: Does deleting emails actually free up storage?