iPhone storage full? How to free up space, step by step

Short answer: open Settings › General › iPhone Storage to see what is using the space, then start with the biggest category. For most people that is photos and videos, apps, Messages attachments and downloaded videos. After deleting anything, empty Recently Deleted: until you do, deleted photos and files keep taking space for up to 30 days. Everything below works with the tools already on your iPhone. A cleaner app is optional, and the last section says honestly where one helps and where it can't.

Paths checked against Apple's iOS 27 user guide on October 20, 2026. On iOS 17, Messages and App Store settings sit directly under Settings, without Apps. In Photos, Utilities is at the bottom of the library on iOS 18 and under Albums on iOS 17.

Check what is filling your iPhone storage

Open Settings, tap General, then iPhone Storage. The bar at the top can take a minute to calculate. Below it, iOS shows recommendations for your phone, followed by every app sorted by size. Tap Show All to see every recommendation; tap one to review exactly what it would remove before you turn it on.

Apple names the usual heavy users: photos and videos, Messages with their attachments, videos downloaded for offline viewing, files and documents, and apps. Start with whichever is largest on your phone. Deleting a hundred small things rarely beats removing one 20 GB game or a season of downloaded TV.

If you got the "Storage Almost Full" message, it is the same story: the warning goes away once there is enough free space again.

Empty Recently Deleted to get the space back

This is the step most guides skip, and the reason the storage bar often doesn't move after a big cleanup. Photos and videos you delete go to the Recently Deleted collection for 30 days, so you can change your mind. Until then they still take space. The same is true for files in the Files app and for messages.

1. Photos: open Collections, then Recently Deleted (below Utilities), and unlock it with Face ID, Touch ID or your passcode. Select what you no longer need and delete it.
2. Files: open Browse, then Recently Deleted, and delete the files there.
3. Messages: in the conversation list, open Recently Deleted and delete what you are sure about.

Deleting from Recently Deleted is permanent. If you use iCloud Photos, a photo you delete on the iPhone is also deleted on your other devices and in iCloud, so only clear photos you don't want anywhere. Even after emptying the album, the free-space figure can take a little while to update.

Offload or delete iPhone apps you don't use

Tap an app in the iPhone Storage list. You get two choices:

• Offload App removes the app itself but keeps its documents and data. Its icon stays on the Home Screen with a small cloud; tap it to reinstall and pick up where you left off, as long as the app is still in the App Store.
• Delete App removes the app and its data. It frees more space, but what was stored only on the phone is gone.

To let iOS handle it, turn on Offload Unused Apps in Settings › Apps › App Store. When storage runs low, iPhone then offloads apps you haven't used for a while. Games, video editors and apps with offline maps or music are usually the biggest wins.

Clear Messages attachments on iPhone

Years of photos, videos and voice messages in chats add up. To delete them in bulk, open a conversation, tap the contact or group icon at the top, choose a category such as Photos, then select and delete what you don't need. Deleting a whole conversation removes its attachments too.

To keep Messages small from now on, go to Settings › Apps › Messages and set Keep Messages to 30 Days or 1 Year. Read this twice before you change it: any option other than Forever automatically removes older conversations, including every attachment in them. If you use Messages in iCloud, deletions apply on all your devices.

Streaming downloads, Safari and the Files app

Downloaded movies, shows, music and podcasts. Videos saved for offline viewing in the TV app and other streaming apps are easy to forget. Remove the ones you have watched inside each app; the same goes for downloaded albums and podcast episodes. Streaming instead of downloading keeps the space free.

Safari. Files you download in Safari land in the Downloads folder in the Files app, on your iPhone or in iCloud Drive depending on your settings. Clearing History and Website Data in Settings › Apps › Safari removes cached website data, but it also signs you out of sites, and the gain is usually small.

The Files app. Look through Downloads and On My iPhone for installers, archives and old videos. For a file in iCloud Drive that you want to keep but not on the phone, use Remove Download: the copy on the device goes away and the file stays in iCloud Drive. Deleting it instead removes it from every device signed in to the same Apple Account, after the usual 30 days in Recently Deleted.

iPhone System Data: what you can and can't do

System Data is the gray part of the storage bar that people search about most. Apple describes this storage as caches, logs, Siri voices, fonts, dictionaries, the Spotlight index and similar system resources. iOS manages it and removes cached files itself when it needs space. You can't clear it directly, and neither can any App Store app.

What can help: restart the iPhone, install the latest iOS update, and use an app's own option to clear its cache, or delete and reinstall apps that hoard cache, such as streaming and social apps. If System Data stays huge for weeks, a full backup, erase and restore is a workaround people report in Apple's community forums. It is a last resort, not an Apple instruction, so back up first. For why a "System Data cleaner" can't exist on iOS, see what iPhone cleaner apps can and can't do.

iPhone storage full even with iCloud

iCloud storage and iPhone storage are two separate pools. Paying for 200 GB or 2 TB of iCloud does not add a single gigabyte to the phone. An iCloud backup is just a copy and frees nothing on the device.

iCloud saves phone storage only through features that move data off the device. The main one is Optimize iPhone Storage for iCloud Photos: go to Settings › [your name] › iCloud › Photos, turn on Sync this iPhone, and make sure Optimize iPhone Storage is chosen rather than Download and Keep Originals. Full-resolution originals then live in iCloud and the iPhone keeps smaller versions, freeing space as the phone needs it. Your iCloud plan must have room for the whole library. The other is Remove Download for iCloud Drive files, described above.

Free up space for an iOS update

If the iPhone says there isn't enough space to update, Apple suggests three things:

1. Turn on Offload Unused Apps from the recommendations in Settings › General › iPhone Storage, or delete apps yourself.
2. If an update was already downloaded but won't install, find it in the same storage list, delete the update, then download it again in Settings › General › Software Update.
3. Update with a computer instead: a Mac, or a Windows PC with the Apple Devices app (or iTunes).

If you deleted many photos or videos recently, emptying Recently Deleted in Photos can also free a lot of space quickly.

Review photos and videos, and where 1Cleaner helps

Photos has a free built-in tool: Collections › Utilities › Duplicates lists duplicate photos and videos iOS has found, and Merge combines each set into one. The collection only appears when there are duplicates. Everything else, such as near-identical shots, bursts, old screenshots and long videos, you can review by hand, or with a cleaner app if your library is large.

That review is what 1Cleaner, the app I make, is built for. It works only with what iOS lets an app see after you allow it: your photos and videos, contacts, calendar, and files in folders you pick.

• Similar photos and bursts. Smart Clean groups shots taken within 10 minutes of each other, compared on the iPhone with Apple's Vision framework. It suggests one photo to keep in each group. Favorites are never preselected for cleanup, and you can change any selection. It does not find duplicates taken far apart in time.
• Screenshots. Recent screenshots and those older than 30 days are listed separately, with nothing selected for you.
• Duplicate and large videos. Possible duplicate videos share length and resolution; an optional check compares the files byte by byte. Large Media finds photos from 10 MB and videos from 100 MB stored on the phone, by their measured size.
• Compression. A large video can become a smaller HEVC copy at up to 720p, up to 1080p or the original resolution, and HDR videos stay HDR. Up to 20 photos at a time can get smaller copies; a copy is kept only if it is at least 10% and 200 KB smaller, and Live Photos become still photos. It is not lossless. Your original stays until you compare and delete it, and only then do you gain the space.
• Files. Files Cleanup checks folders you pick, such as Downloads, for files of 20 MB or more and files of 1 MB or more not changed in over a year. Nothing is preselected, and the files you choose usually move to Recently Deleted in Files.
• Review before deleting. Photos and videos you clean go to App Bin first and stay in Photos. Deleting there takes a confirmation in 1Cleaner and then the iOS one, and Photos keeps the items in Recently Deleted for 30 days. 1Cleaner never empties Recently Deleted for you.

What 1Cleaner doesn't do: clear System Data, other apps' caches or Messages attachments, offload apps, or free iCloud storage in general. For those, the built-in steps above are the only way. The default scan runs on the iPhone without a network connection; there is no account, no ads, and no analytics or tracking SDKs, and the App Store privacy label says Data Not Collected.

FAQ: iPhone storage full

Sources for this iPhone storage guide

• Apple Support, "How to check the storage on your iPhone and iPad" (recommendations, offload vs. delete, storage categories, cached files), checked October 20, 2026: support.apple.com/en-us/108429
• iPhone User Guide (iOS 27), "Manage storage on iPhone" (biggest storage users, Offload Unused Apps), checked October 20, 2026: support.apple.com
• iPhone User Guide (iOS 27), "Delete or hide photos and videos on iPhone" (Recently Deleted, iCloud Photos), checked October 20, 2026: support.apple.com
• iPhone User Guide (iOS 27), "Merge duplicate photos and videos on iPhone", checked October 20, 2026: support.apple.com
• iPhone User Guide (iOS 27), "Delete messages and attachments in Messages on iPhone" (attachments, Keep Messages, Recently Deleted), checked October 20, 2026: support.apple.com
• iPhone User Guide (iOS 27), "Back up and sync your photos and videos with iCloud" (Optimize iPhone Storage), checked October 20, 2026: support.apple.com
• Apple Support, "Delete files or recover deleted files in the Files app on your iPhone or iPad" (Recently Deleted, Remove Download), checked October 20, 2026: support.apple.com/en-us/104953
• Apple Support, "If your iPhone or iPad won't update" (not enough storage), checked October 20, 2026: support.apple.com/en-us/108905
• Apple Devices User Guide for Windows, "Update the software on your iPhone, iPad, or iPod touch", checked October 20, 2026: support.apple.com
• 1Cleaner, what each tool does and its privacy facts: onebuckapps.com/1cleaner-iphone-cleaner