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6 Easy Ways to Fix iPhone Storage Almost Full After iOS 18 Update

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With the update to iOS 18, many users report that their iPhone storage fills up rapidly, even showing warnings that "iPhone Storage Almost Full". This issue can lead to decreased device performance, making it difficult to install new apps or take new photos. This article will delve into the reasons behind the storage shortage after the iOS 18 update and provide a series of effective solutions to fix iPhone storage almost full after iOS 18 update, helping restore your device's normal functionality.

fix iphone storage almost full after ios 18 update

 

Part 1. Why Is My iPhone Storage Full After Upgrade to iOS 18?

Why does iOS 18 take up so much storage? The primary reason for storage issues after the iOS 18 update is that it didn't effectively clear cached data and system files accumulated over time. Major iOS updates often leave behind temporary files and caches that consume valuable storage space. As a result, old system data persists and combines with the space needed for new iOS 18 features, leading to the frustrating "iPhone Storage Almost Full" issue, even if you had ample free space previously.

Clearing this system cache and data clutter is essential for reclaiming your iPhone's storage after installing iOS 18.

Part 2. How to Fix iPhone Storage Almost Full After iOS 18 Update

If you encounter the iPhone storage almost full alert after updating to iOS 18, you can try the following methods to free up storage space. Each method includes detailed steps to help you easily resolve the issue.

Fix 1. Delete Unnecessary Apps and Files

Deleting unnecessary apps and files is the most direct way to free up storage space. By clearing out unused photos, videos, and apps, you can significantly reduce the storage burden on your iPhone.

Delete Unwanted Photos and Videos

Photos and videos are often the main culprits for taking up storage space. To free up more storage, you should regularly clean these media files.

To delete the photos and videos from your iPhone, follow the steps below:

Step 1. Open the "Photos" app and browse your albums.

Step 2. Select the unwanted photos and videos.

Step 3. Tap the "trash can" icon in the bottom right corner to delete them.

delete photos from iphone

Step 4. Go to the "Recently Deleted" album and permanently remove these photos and videos to free up storage.

permanently delete photos from iphone

Uninstall Unused Apps

Unused apps can take up a significant amount of storage space. Regularly cleaning these apps is an important measure to keep your iPhone running smoothly.

Here are the steps:

Step 1. Open "Settings" > "General" > "iPhone Storage".

iphone storage

Step 2. You'll see all apps and their storage usage.

Step 3. Find the apps you rarely use or no longer need.

Step 4. Tap the app and select "Delete App" to free up storage space.

delete apps from iphone to fix iphone storage full after update

If you like, you can enable the "Offload Unused App" feature on the iPhone storage page to offload unused apps automatically.

Delete Old Messages

Images, videos, and other attachments in text messages and iMessage can also take up a significant amount of storage space. By cleaning up old conversations, you can save a lot of space.

Here is how to do it:

Step 1. Open "Settings" > "Messages".

Step 2. Scroll down and select "Keep Messages".

Step 3. Choose "30 Days" or "1 Year", and the system will automatically delete messages older than this period.

delete old messages to fix why does ios 18 take up so much storage

Fix 2. Store Photos in iCloud Photos

iCloud Photos can help you store all your photos and videos in the cloud, freeing up local storage space. This is a very effective solution if your device has limited space.

Here's how it works:

Step 1. Open "Settings" > "Photos".

Step 2. Enable the "iCloud Photos" option.

Step 3. Select "Optimize iPhone Storage", so your device only keeps optimized versions of photos, while the original versions are securely stored in iCloud.

turn on icloud photos to fix why is my iphone storage full after upgrade

Fix 3. Clear Cache from Safari and Apps

As you browse the web with Safari or use apps, cache files accumulate, taking up significant storage space. Regularly clearing these cache files can effectively free up storage.

To do this, follow the steps below:

Step 1. Open "Settings" > "Safari".

Step 2. Scroll down and select "Clear History and Website Data".

Step 3. Confirm the action in the pop-up dialog to clear Safari's cache.

clear the cache in safari

For app caches, go into the app's settings and look for the "Clear Cache" option to proceed.

Fix 4. Back Up and Delete Data via iCloud

iCloud allows you to back up important data to the cloud and then delete it from your device to save space. This is a very secure and effective method, especially when your device storage is nearly full.

Here are the steps:

Step 1. Open "Settings" > "Apple ID" > "iCloud".

Step 2. Select "iCloud Backup" and ensure the backup feature is enabled.

back up iphone to icloud

Step 3. After the backup is complete, you can delete certain files from your device, such as videos or app data, to free up storage space.

Note: Besides iCloud, you can also back up your iPhone to a computer using iTunes or Coolmuster iOS Assistant. After that, delete the files from your iPhone to free up space.

Fix 5. Restart the iPhone

Sometimes, temporary files on the device can accumulate excessively, leading to false storage usage. Restarting the device can clear these temporary files and restore actual storage space.

Here is how to do it:

For iPhone X, 11, 12, 13, or later:

  • Press and hold both the "Volume" button and the "Side" button until the power-off slider appears.
  • Drag the slider to turn off your device, then wait about 30 seconds for it to completely power down.
  • To turn your device back on, press and hold the "Side" button until the Apple logo appears.

For iPhone 6, 7, 8, or SE (2nd or 3rd generation):

  • Press and hold the "Side" button until the power-off slider appears.
  • Drag the slider to turn off your device, then wait about 30 seconds for it to shut down.
  • To turn your device back on, press and hold the "Side" button until the Apple logo appears.

For iPhone SE (1st generation), 5, or earlier:

  • Press and hold the "Top" button until the power-off slider appears.
  • Drag the slider to turn off your device, then wait about 30 seconds for it to shut down.
  • To power your device back on, press and hold the "Top" button until the Apple logo appears.

restart the iphone to fix iphone storage almost full after ios 18 update

Part 3. How to Fix iPhone Storage Almost Full After iOS 18 Update Without Data Loss

If you've already cleared caches, deleted files, and offloaded apps, but your iPhone storage is still nearly full after updating to iOS 18, this may be caused by an issue with the iOS 18 system. In this case, iOS System Recovery offers a comprehensive solution. It is a highly-rated software that can fix iOS system issues while keeping your data intact.

What can iOS System Recovery do for you?

Here is how to fix iPhone storage full after updating to iOS 18 using iOS System Recovery:

01Download and install iOS System Recovery on your computer, then launch the program. From the main interface, select the "iOS System Recovery" option and connect your iPhone to the computer via USB.

choose ios system recovery

02A pop-up will show the various issues the tool can address. Click the "Start" button to proceed.

click the start the button

03Choose either "Standard Mode" or "Advanced Mode." The tool will detect your iPhone's basic information; tap "Confirm" to continue.

select the repair mode

04Finally, click the "Repair" button to start downloading the firmware package and repairing your iPhone.

how do you fix iphone storage full after update
 using ios system recovery

The Bottom Line

Insufficient storage space after the iOS 18 update is a common issue, but you can easily resolve it by deleting unnecessary files, using iCloud to optimize storage, and clearing the cache. If deleting doesn't solve the problem, use iOS System Recovery to fix your iOS 18 system without any data loss.

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