iPhone storage full: what takes up space and how to free it up

By Pruneo TeamPublished: November 3, 2026Updated: November 3, 2026

You get the “Storage Almost Full” alert, the camera won’t take another photo, or the iOS update doesn’t fit. Before you start deleting things at random, find out what is actually using the space. This guide shows where to look and what you can free up by hand, without installing anything.

Step 1: see what takes up the most space

Open Settings > General > iPhone Storage. At the top there’s a bar with used space by category (apps, photos, iOS, System Data and others). Below it, iOS shows a few recommendations and a list of apps sorted by size.

The bar can take a few seconds to load. Tap any app in the list to see how much the app itself uses and how much its documents and data use. Apple explains what goes into each category in How to check the storage on your iPhone and iPad.

On most iPhones, Photos is at the top. If that’s you, go to step 2. If the top spot is an app like WhatsApp, Messages or a streaming app with downloads, jump to step 3.

Step 2: photos and videos

Start with videos

One minute of video takes much more space than a photo, especially in 4K. In the Photos app, open Videos under Media Types (in iOS 26 or later, inside Collections) and go through the long ones and the ones you no longer need.

Merge duplicates

Since iOS 16, the Photos app finds copies of the same photo for you. Look for Duplicates under Utilities and tap Merge (Apple’s steps). We walk through it in How to delete duplicate photos on iPhone.

Screenshots and bursts

Media Types also has Screenshots and Bursts. Screenshots pile up fast and you rarely need them after a few days. From each burst, keep one or two shots.

Optimize storage with iCloud

If you use iCloud Photos and have room in iCloud, go to the Photos settings (in iOS 18 or later they’re in Settings > Apps > Photos) and choose Optimize iPhone Storage. Full-size originals stay in iCloud and your iPhone keeps smaller versions. Download and Keep Originals keeps everything in full on the phone and uses more space.

Empty Recently Deleted

Anything you delete in Photos goes to Recently Deleted and keeps using space for 30 days. You’ll find it under Utilities in the Photos app (in iOS 26 or later, tap Collections first). Apple covers it in Delete or hide photos and videos on iPhone.

1. Open Photos and tap Recently Deleted under Utilities.
2. Tap View Album and unlock it with Face ID, Touch ID or your passcode.
3. Tap Select, choose what you want to remove, then tap Delete in the menu at the bottom.

Step 3: apps, Messages and WhatsApp

Offload apps you don’t use

In Settings > General > iPhone Storage, tap an app and choose Offload App. The app goes away, but its documents and data stay: reinstall it and you pick up where you left off. Delete App removes the data too.

To let iOS do this for you, go to Settings > Apps > App Store and turn on Offload Unused Apps. It can also show up among the recommendations on the iPhone Storage screen. See Manage storage on iPhone for details. When storage runs low, iOS offloads apps you don’t open and keeps their data.

Messages

In the app list, tap Messages. You can review large attachments there (photos, videos and files people sent you) and delete the ones you don’t need.

You can also have old messages removed automatically. In the Messages settings (in iOS 18 or later, Settings > Apps > Messages), find Keep Messages and choose 30 Days or 1 Year instead of Forever.

WhatsApp and other chat apps

WhatsApp stores photos, videos and voice notes inside the app. Open WhatsApp and go to Settings > Storage and Data > Manage Storage. You’ll see which chats and files take the most space, and you can delete them there. If WhatsApp saves media to your photo library, those copies are in Photos too.

Apps with downloads

Music, TV, podcast and offline map apps keep downloads that can add up to several gigabytes. Remove them from each app’s downloads section.

Step 4: Safari and the rest

In the Safari settings (in iOS 18 or later, Settings > Apps > Safari) there’s Clear History and Website Data. It frees some space, but it also signs you out of websites.

If, after all this, System Data is the biggest part, read What is System Data on iPhone and why is it so big. It covers what you can and can’t do about it.

What to avoid

• Deleting photos you have no other copy of. Without iCloud Photos or another backup, Recently Deleted is your only way back, and only for 30 days.
• Deleting an app “to clear its cache” without knowing what it stores. Deleting an app removes its data from your iPhone. If that data isn’t in the cloud, it’s gone.
• Installing apps that promise to clean the system. iOS doesn’t let any app delete other apps’ data or system data.

Summary

1. Check what uses the most space in Settings > General > iPhone Storage.
2. Go through videos, duplicates, screenshots and bursts in Photos.
3. Offload apps you don’t use and clean up attachments in Messages and WhatsApp.
4. Empty Recently Deleted so the space is actually freed.

If you have a Mac too, read How to free up space on Mac.

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