To free up space on an iPhone, open Settings > General > iPhone Storage, review the Recommendations at the top, then offload apps you don’t use, delete large videos and old Messages attachments, and clear Safari’s website data. The iPhone Storage screen is the control center for all of this: it shows a colored bar of exactly what’s eating your space and gives one-tap suggestions tailored to your device. Most people recover several gigabytes in a few minutes without deleting a single thing they care about.
See what’s using your space
- Open Settings > General > iPhone Storage.
- Wait a moment for the bar graph to load — it breaks usage into Apps, Photos, Media, Messages, and System Data.
- Read the Recommendations listed just below it. These are personalized, such as “Review Large Attachments” or “Offload Unused Apps.”
- Scroll the app list, which is sorted by size, to spot the biggest offenders.
This one screen tells you where to aim, so you’re not guessing.
Offload or delete apps
Tap any app in the list to see its size and two options:
- Offload App removes the app but keeps its data. A grey cloud icon stays on your Home Screen, and tapping it reinstalls the app with everything intact — ideal for games or apps you use seasonally.
- Delete App removes the app and its data permanently.
To let iOS handle this automatically, turn on Settings > App Store > Offload Unused Apps. Deleting apps you no longer want is covered in more detail in our guide to deleting apps on iPhone.
Tame photos and videos
Camera roll is the number-one space eater for most people. Two moves help a lot:
- Turn on Settings > [your name] > iCloud > Photos > Optimize iPhone Storage. Full-resolution originals live in iCloud while the device keeps space-saving versions.
- Empty the Recently Deleted album — photos you “deleted” sit there for up to 30 days and still take up space. In Photos, go to the Recently Deleted album and choose Delete All.
Also scan for long videos and duplicate bursts; a few minutes of 4K footage can be over a gigabyte each.
Clear Messages, mail, and Safari clutter
Attachments quietly pile up. Reclaim them:
- Messages: in iPhone Storage, tap Messages > Review Large Attachments and delete big photos, videos, and GIFs. Set Settings > Messages > Keep Messages to 30 Days or 1 Year to auto-purge old threads.
- Safari: go to Settings > Apps > Safari > Clear History and Website Data to dump cached pages.
- Streaming and podcast apps: delete downloaded episodes and offline shows you’ve finished — check Music, Podcasts, and Netflix downloads.
Update iOS and clear app caches
A full phone can block iOS updates, which sometimes need several gigabytes free to install. If Settings > General > Software Update says there isn’t enough room, clear some space first, then update — a fresh iOS build often reclaims storage on its own. Beyond that, some apps hoard caches: streaming, social, and map apps are common culprits. Many let you clear cached data from within their own settings, and for the worst offenders, deleting and reinstalling the app wipes accumulated junk while keeping your account intact.
Check what’s stored in iCloud
Freeing space on the device is separate from your iCloud storage, and the two interact. “Optimize iPhone Storage” only works if iCloud has room for your full-resolution originals, so if iCloud is also full, photos can’t offload and the device stays cramped. Open Settings > [your name] > iCloud to see what’s using your plan; Photos and iCloud Backup are usually the largest. Deleting old device backups you no longer need is a fast way to reclaim iCloud space.
Stop your phone from refilling
Some habits refill a phone as fast as you empty it. Auto-downloaded podcasts, saved-to-camera-roll images from messaging apps, and offline music all quietly rebuild. In WhatsApp, turn off automatic media saving; in Podcasts, limit downloads to a few recent episodes; and periodically clear the Downloads folder in the Files app, which many people forget is even there.
About “System Data” and “Other”
If a large slice is labeled System Data, don’t panic. It’s caches, logs, and temporary files that expand and contract on their own, and iOS clears it automatically when space gets tight. You can nudge it down by restarting the iPhone and clearing Safari data, but there’s no single button to wipe it, and that’s normal behavior rather than a bug.
When cleanup isn’t enough
If you’re constantly near full even after tidying up, consider:
- Upgrading your iCloud+ plan so Optimize Storage has room to work.
- Backing up photos to a computer or another cloud service, then removing them from the device.
- On your next phone, choosing a larger storage tier if photography and video are a big part of how you use it.
Keeping a gigabyte or two free lets iOS install updates and process photos smoothly. If your storage trouble is actually a connectivity glitch masquerading as a slowdown, our guide to resetting network settings covers that separate fix.
