I’m sure this sounds familiar: You’re trying to install the latest iOS release, upgrade to a new iPhone, take photos or record video, or just download that cool app everyone’s talking about, and your iPhone says the storage is full.

You’ve already deleted every app you don’t think you need, and there’s still not enough space on your iPhone. So you open Settings, tap General, then iPhone Storage, and, sure enough, your iPhone is full. Worst of all, a huge chunk of it is just listed as Other (renamed System Data in iOS 15). What’s that supposed to mean? How do you get rid of it? The System Data/Other storage sections are mysterious and confusing, and there’s no one answer that works for everyone, but hopefully, this guide will help you deal with this problem.

Latest iPhone release: iPhone 16e (March 2025), iPhone 17, iPhone Air, iPhone 17 Pro and 17 Pro Max (September 2025)

Latest iOS release: iOS 26.2 (December 2025)

Latest iOS beta: N/A

How to view your iPhone storage

To see how much storage all your apps and data are taking up on your iPhone’s storage, open the Settings app, select General, then iPhone Storage. At the top, you’ll see a bar graph showing your total iPhone storage and which types of data are filling it up. Beneath that, you’ll find a list of applications on your phone and how much room they take up, both for the app itself and its stored data.

It may take several seconds for your iPhone to show the graph, as it takes time to scan and analyze its storage. Even after the chart first appears, you’ll want to wait several seconds more for it to stabilize, as the app list and storage sizes can change while your phone completes its analysis.

<figure class="wp-block-image wp-lightbox-container"><button class="lightbox-trigger" type="button">
<svg fill="none" height="12" viewBox="0 0 12 12" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z" fill="#fff"></path>
</svg>
</button><figcaption class="wp-element-caption">

You’ll find your iPhone storage details a few layers deep in the Settings app.

</figcaption></figure>

What is System Data (or Other) on iPhone?

Your iPhone Storage menu will divide that bar up top into familiar categories like Apps, Media, Photos, and Mail, but also a System Data (iOS 15 and later) or Other category that is sometimes very large. It’s common for System Data to be in the 5GB to 20GB range, but if it’s way over 20GB, it has probably grown out of control. You can scroll all the way down to the bottom of the app list where you will see iOS, which are the files required by the system and are usually around 10GB, and System Data, which are files other than apps and downloads that are collected by iOS. Tap on System Data to see how much space it is taking up.

The System Data/Other category is big and varied because it’s a real catch-all category. It comprises system caches, logs, Siri voices (if you’ve downloaded more than one), updates, and so much more. One of the biggest culprits for System Data/Other growing out of hand is streaming lots of music and video. When you download video or music from the iTunes Store, TV app, or Music app, it’s indexed as Media. But streams have caches used to ensure smooth playback, and those are categorized as System Data/Other.

Safari’s caches can start to grow pretty large, too. And if you send tons of texts with images or video, the caches for that can start to fill up a lot of space. Your iPhone is supposed to manage these caches to keep your storage from becoming completely full, but it doesn’t always do a great job.

<figure class="wp-block-image wp-lightbox-container"><button class="lightbox-trigger" type="button">
<svg fill="none" height="12" viewBox="0 0 12 12" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z" fill="#fff"></path>
</svg>
</button><figcaption class="wp-element-caption">

Clearing your Safari data might reduce the size of Other.

</figcaption></figure>

We discuss how to delete Other storage on a Mac and how to delete System Data on a Mac separate articles.

How to reduce the size of System Data/Other on an iPhone

You can’t get rid of System Data/Other entirely, but you can sometimes reduce its size.

First, let’s try clearing your Safari caches. Open Settings > Safari and choose Clear History and Website Data. If you have a lot of Safari tabs open on your iPhone, you might want to close most of them, too.

You might also want to change Messages to save fewer old messages. Open Settings, then Messages, and scroll down to the Message History setting. By default, Keep Messages is set to Forever, but you may want to change it to 1 Year or even 30 Days to reduce the data that the Messages app caches. Just beware that doing this will mean old messages will be deleted–so if you have any messages you want to keep find a way to back them up.

<figure class="wp-block-image wp-lightbox-container"><button class="lightbox-trigger" type="button">
<svg fill="none" height="12" viewBox="0 0 12 12" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z" fill="#fff"></path>
</svg>
</button><figcaption class="wp-element-caption">

If you’re a heavy texter, your Messages app might be filling up your storage with a lot of data.

</figcaption></figure>

Finally, go back to iPhone Storage and look at the apps list. Most of the apps store data that is categorized as Apps, but some will keep caches that are categorized as System Data/Other. If, say, the Podcasts app is taking up a couple of gigabytes of space, it’s likely mostly cached data. Deleting the app and re-downloading it might put a dent in the System Data/Other category.

How to free up space taken up by iOS

While Apple lets you delete stock iOS apps that you don’t want to free up space, the system still takes up quite a bit of room, in some cases 25GB or more. However, if you’re running an iPhone 15 Pro or later and have Apple Intelligence enabled, it’s taking up more than 10GB of space. Simply turning it off will help you reclaim it. Head over to the Apple Intelligence & Siri tab in Settings and flip the toggle. The free space won’t show up in storage immediately, but the system will be able to use that space to install updates and apps. And you can always turn it back on later.