When checking iPhone storage, you must have found System takes up a significant amount of storage capacity. Apart from deleting photos and media to get extra space, you should also clear iPhone system data to free up storage.
What is iPhone system data? How to reduce those large system file size to smaller ones?
That's what you shall know in this post.

Quick Guide
System is the space taken by the operating system on iPhone. This can vary based on your device and model. Generally speaking, iPhone System storage contains 2 types:
• System files that are necessary for operating the core system of iPhone and iPad.
• Temporary system files that include backups, logs, caches, settings, and Others files.
To check your iPhone system storage, you should tap Settings, then select General, and tap iPhone Storage. Then you can see the total iPhone storage and used storage taken by System, Photos, Apps, Media, and Other.
iPhone system files are often invisible to the users, and you cannot access or open them directly like viewing a photo or video.
To clear iPhone system data, you shall move to the next part.
Like cleaning computer system files, you will need a professional iPhone system cleaner tool, because you cannot distinguish between junk system files and necessary system operation files.
Aiseesoft iPhone Cleaner is such a system junk eraser tool for iPhone. It can scan iPhone and delete those junk system files, including caches, invalid system files, temporary files, and crashed log files quickly. Moreover, it can free up more space by uninstalling apps, cleaning large files, and deleting photos that take up a large amount of space on iOS device.
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Aiseesoft iPhone Cleaner – Clean iPhone System Data
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The steps of erasing iPhone system data are pretty easy.
Free download this iPhone system cleaner software on either Windows or Mac computer based on your device. Run it after a successful installation.
Plug your iPhone into this computer via a USB cable. Do not forget to unlock the iPhone and tap Trust to confirm on iPhone.
Select Free up Space from the left pane and click Erase Junk Files from the drop-down list.
Then this software will start a system junk scan on iPhone. You can check the scanning progress bar on the right pane.
When the scanning process is complete, you can find all the system junk files categorized on the right pane. Tick the box before the system types, and click the Erase button at the bottom-right corner to clean iPhone system files immediately.
This method can also clean the junk files in Other storage on iPhone.
The second option to wipe iPhone system space is to restore iPhone or iPad to factory settings.
However, while wiping all system data on iPhone, you will also erase all content and settings on iPhone or iPad.
That's quite an extreme option!
There are 6 Ways to restore iPhone to factory settings:
1. Go to Settings > General > Transfer or Reset iPhone > Erase All Content and Settings
Follow the guidance and input you Apple ID password to clear all system data on iPhone.
To be clear: Before you wiping iPhone system files by restoring, you should backup iPhone data to avoid any data loss.
iPhone will keep message forever by default. If you have an iPhone of years, the massages and their attachment will be a huge part in system data. You can select the message and delete the by hand or setting Auto-delete.
Browse the web with Safari will generate lots a web cache. This cache will accumulate to a large amount the be a huge part of the iPhone system data. You need to clear the Safari cache as following:
Apps like TikTok, Spotify, YouTube and Instagram will store system data internally to make videos and music load faster. You can clear these streaming app data to release the iPhone storage. Take TikTok as example:
Deleting an app removes all your data, but offloading an app frees up storage used by the app but keep document and data. Reinstalling the app will place back your data.
How to make iOS 26 all clear?
You can Erase All Content and Settings to clear all data and setting of iOS 26, but your need to back up the important files in advance and restore after resetting. For ease cleaning up, you can use Aiseesoft iPhone Cleaner to clear iOS 26 system data without restoring.
How to get more storage on iPhone?
There are various ways to get more space apart from buying iCloud service. You can delete unwanted data like photos, videos, music, etc., and wipe iPhone system data. Check it in detail here to get more space on iPhone.
What is Other in data usage on iPhone?
Other refers to the non-removable mobile assets, like Siri voices, fonts, dictionaries, non-removable logs and caches, Spotlight index, and system data, such as Keychain, CloudKit Database, and cached files can't be deleted by the system.
Conclusion
System data takes up a huge space on iPhone. When your iPhone storage becomes fatter, clearing iPhone system data can be a good solution. This page collects 6 Ways to delete iPhone system files. To wipe iPhone system data without restoring, you should use Aiseesoft iPhone Cleaner. If you just a free way to get more space, you can erase all iPhone content and settings.
Now it is your turn.
Which way is your favorite one?
Or you may have other solutions?
Let me know by leaving your comments below.
iPhone Cleaner can clean up useless data on your device selectively. You can also use it to wipe your private data and keep your iPhone/iPad/iPod Touch fast and safe.
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