To check your iPhone storage, open Settings, tap General, then tap iPhone Storage. A color bar shows how much space is used versus free, and a list underneath ranks your apps by how much room each one takes. That screen is also where Apple suggests ways to free space. Here is how to read it and, more importantly, how to clear room without losing anything you care about.

Check your storage in Settings

  1. Open Settings.
  2. Tap General.
  3. Tap iPhone Storage.

Wait a moment for the bar to fill in. The colored segments show categories such as Apps, Photos, Media, and System Data. Below the bar, apps are listed largest first, and you will often see Recommendations at the top, like “Offload Unused Apps” or “Review Large Attachments,” which you can turn on with one tap.

iPhone storage vs iCloud storage

People often confuse these, and it changes what you should do:

  • iPhone storage is the physical space inside the device. That is what fills up when you cannot take a photo or install an update.
  • iCloud storage is online space (5 GB free, or more if you pay) used for backups, iCloud Photos, and files.

To check iCloud, go to Settings, your name, iCloud, then tap Manage Account Storage (labeled Manage Storage on some versions). A full iCloud stops backups; a full iPhone stops the device itself. Fix whichever one is actually full.

Free up space fast

Work down this list from biggest wins to smallest:

  1. Offload or delete unused apps. In iPhone Storage, tap a big app and choose Offload App (keeps data) or Delete App (removes everything).
  2. Delete large videos. Video is the number-one space hog. In Photos, sort by size or check the Videos album and remove ones you have saved elsewhere.
  3. Clear Safari data. Go to Settings, Apps, Safari, Clear History and Website Data (or Settings, Safari on older iOS).
  4. Review Messages attachments. In iPhone Storage, tap Messages to delete large photos and videos, or set messages to auto-delete after 30 days or 1 year under Settings, Apps, Messages.
  5. Delete downloaded music, podcasts, and offline maps you no longer need.

Empty Recently Deleted

This is the step most people miss. Deleted photos are not gone right away; they wait in Recently Deleted for up to 30 days and keep taking space the whole time.

  1. Open Photos and go to Albums.
  2. Scroll to Recently Deleted and open it (you may need Face ID or your passcode).
  3. Tap Select, then Delete All, and confirm.

Use Optimize iPhone Storage for photos

If photos are eating your space and you use iCloud Photos, let iPhone keep smaller versions on the device:

  1. Go to Settings, your name, iCloud, Photos (or Settings, Photos).
  2. Turn on Optimize iPhone Storage.

Full-resolution originals stay safe in iCloud while lighter copies live on the phone, downloading the full version only when you need it. This can free several gigabytes on a photo-heavy device.

What about System Data?

You may see a large System Data (formerly “Other”) segment. It holds caches, logs, and temporary files, and it grows and shrinks on its own. You cannot delete it directly, but restarting your iPhone and clearing app caches usually trims it. If it is stubbornly huge, a backup followed by a reset is the last resort, though that is rarely necessary.

Understanding the storage categories

The colored bar breaks your space into groups, and knowing what each means tells you where to aim:

  • Apps is the apps themselves plus their data; usually the easiest place to reclaim gigabytes.
  • Photos covers your camera roll, including videos, which are typically the single largest use of space.
  • Media is downloaded music, podcasts, videos, and books saved for offline use.
  • Messages is your text history and, more importantly, the photos and attachments people have sent you.
  • System Data and iOS are the operating system and its working files, which you should leave alone.

Stop your storage filling up again

A few settings keep space from creeping back:

  1. Turn on Settings, App Store, Offload Unused Apps so rarely used apps clear themselves automatically.
  2. In Settings, Apps, Messages, Keep Messages, set texts to auto-delete after 30 days or 1 year instead of Forever.
  3. Under Settings, Camera, Formats, choose High Efficiency so photos and videos are saved in the space-saving HEIF/HEVC format.

These are set-and-forget changes that quietly hold your storage in check without you having to clean up as often.

It also helps to review downloads you forget about: streaming apps quietly cache offline shows, and podcast apps keep old episodes. Opening each of those apps’ settings and turning off automatic downloads, or clearing already-downloaded media, can recover a surprising amount of room over time.

Related iPhone guides

The single biggest lever is usually apps, so see how to delete apps on iPhone and the Delete-versus-Offload difference. If you are clearing space before a sale, also read how to turn off Find My iPhone, and to cut down on screenshot clutter, our screenshot guide explains where they are stored.