Where to find your storage information on iPhone

Open Settings, then tap General, then iPhone Storage. The screen shows your total capacity at the top — for example, "128 GB" — and a colored bar beneath it. The bar breaks down what's using that space: apps in blue, photos and videos in yellow, system files in gray, and other data in different colors. Below the bar, you see a list of every app on your phone, ranked by size from largest to smallest.

This is the only place on your iPhone that shows you the complete picture. The storage number updates when you open the screen, so if you've deleted things recently, close Settings and reopen it to see the change reflected.

Key Takeaways

  • Your storage information lives in Settings > General > iPhone Storage, and it shows both how much space you have left and what's using it.
  • Photos and videos typically take up the most space on most iPhones, followed by apps and cached data from web browsing.
  • You can delete apps directly from the iPhone Storage screen by tapping an app and choosing "Offload App" or "Delete App".
  • If you're running low on space, clearing your Photos app, deleting old messages with attachments, and removing unused apps are the fastest ways to free up room.

Understanding what each color in the storage bar means

The colored bar at the top of iPhone Storage is a quick visual summary. Blue represents apps and their data. Yellow is photos and videos. Gray is the iOS system itself and system apps you cannot delete. Green is usually music or other media. Red or orange typically shows documents, downloads, and miscellaneous files. If you see a large gray section, that's normal — iOS always reserves space for itself.

Tap any color in the bar to jump to that category. For example, tapping the yellow section takes you to Photos, where you can see how many photos and videos you have and delete them in bulk.

How to see what apps are using the most space

Scroll down the list under the storage bar. Each app shows its size in gray text on the right. The list is sorted largest to smallest, so the top apps are your biggest space users. Apps like social media, streaming services, and games often take several gigabytes because they store photos, videos, and cached data on your phone.

Tap any app to see two options: Offload App or Delete App. Offload removes the app but keeps your data and login information, so reinstalling it later is faster. Delete removes everything. For apps you use occasionally, offload is usually the better choice.

Why your iPhone says it's full when you have storage left

Sometimes your iPhone refuses to install updates or take photos even though iPhone Storage shows available space. This usually means iOS needs a buffer of free space to function — typically 1 to 2 GB. If your available space is smaller than that, your phone treats it as full.

The fastest fix is to delete a large app temporarily, complete the update or task, then reinstall it. Alternatively, delete old photos or videos, clear your Safari browsing history (Settings > Safari > Clear History and Website Data), or remove old text message threads with large attachments.

Photos and videos: the biggest space drain on most iPhones

Photos and videos usually occupy more space than anything else. Open the Photos app, tap Albums at the bottom, then scroll down and tap Recently Deleted. Anything in that folder still counts toward your storage until you permanently delete it — which happens automatically after 30 days, but you can delete it when ready by tapping Select and then Delete All.

If you take a lot of screenshots or have duplicate photos, the Duplicates album (in Albums > Utilities) shows near-identical images side by side. You can delete duplicates in bulk from there. For videos, check your Camera Roll — a single 4K video can be 500 MB to 1 GB.

Using iCloud Photos to move storage off your phone

If you turn on iCloud Photos in Settings > [Your Name] > iCloud > Photos, your iPhone stores full-resolution originals in iCloud and keeps lower-resolution versions on your phone. This frees up gigabytes of local space while keeping your photos accessible. You need an iCloud+ subscription (50 GB or larger) for this to work well — the free 5 GB tier fills up quickly.

When iCloud Photos is on, deleting a photo from your iPhone also deletes it from iCloud, so make sure you understand that before turning it on. You can also manually delete old photos from your phone while keeping them in iCloud: go to Settings > Photos and turn on "Optimize iPhone Storage" instead of "read and Keep Originals".

Clearing cached data and temporary files

Apps store temporary data — called cache — to load faster next time. Over time, this adds up. You cannot delete cache selectively for one app, but you can clear it for all apps at once. Go to Settings > General > iPhone Storage, scroll to the bottom, and look for "System Data" or "Other" — this often includes cache. Unfortunately, iOS does not give you a button to clear just the cache; you have to delete and reinstall apps to remove their cached data completely.

A faster option: go to Settings > Safari > Clear History and Website Data. This removes Safari's cache, which can be several hundred megabytes. For other apps like social media or email, the easiest approach is to offload the app (which removes its cache) and then reinstall it.

Frequently Asked Questions

What does "System Data" mean in iPhone Storage?

System Data includes iOS itself, Siri voice data, cached files, and temporary data from various system processes. You cannot delete it selectively. If it's taking up more than 5 GB, restart your iPhone — sometimes cached data does not clear automatically.

Can I move photos to an external drive to free up iPhone space?

Yes. Connect your iPhone to a Mac or Windows computer, open the Photos app or Finder, and drag photos to your computer. Once they're safely on your computer, delete them from your iPhone. This is faster than relying on iCloud if you have a large photo library.

Why does my iPhone Storage show more space used than the sum of all my apps?

The total includes system files, cached data, temporary files, and data from apps that may not show up in the app list. Restarting your iPhone sometimes reduces this number because it clears temporary cache files.

Does deleting an app also delete my data and login information?

Deleting an app removes both the app and its data. If you want to keep your login information and settings, use "Offload App" instead — it removes the app but saves your data so reinstalling is faster.

How much storage should I keep free on my iPhone?

Keep at least 1 to 2 GB free for iOS to function properly. If you take photos or videos regularly, aim for 5 GB or more. If you're constantly hitting the storage limit, consider upgrading to a larger iPhone model or using iCloud Photos to move older photos off your device.