Your iPhone's low storage space may be because it is taken over by system data, which may consume all available capacity. Here's how to regain space when things get too bloated to run.
Storage capacity is an important issue for mobile device users, and the available space on an iPhone, iPad, or even a Mac is a sensitive issue that concerns everyone. While users with large storage capacity will have less trouble than most, those using more modest storage to save money may face more stress.
Manage applications on your device by uninstalling or deleting them, maintaining stored videos and other files, relying on cloud storage capacity and other technologies that are often used to control storage space usage.
Deleting files and wiping application caches will help, of course, but they won't help with occasional issues involving system data. Sometimes, system data grows to huge size and there is almost nothing you can do to fix it.
Here's what you can do to recover more free storage space available to you.
By checking your iPhone's storage usage, you'll find that iOS easily categorizes its data usage into multiple categories, including Apps, Photos, Media, iOS, and System Data.
These are self-explanatory, Photos and Media consists of images, videos, and other typical media style files. Apps refer to apps downloaded from the App Store and the data cache for each app, while iOS is the storage consumed by the operating system itself.
System Data, and what the Settings app refers to as "Other System Data," include many files that are not covered by other categories.
System data typically does not take up tens of gigabytes of storage space, but problems can arise. The definition in iOS is that system data "includes caches, logs, and other resources currently used by the system." This doesn't say what the data is, but it can contain various logs, temporary data storage, and other elements that are not strictly considered part of any of the listed applications.
Then some elements are used by iOS but do not belong to a specific application. For example, downloading a different Siri voice or installing fonts can expand this section, but they are not defined to be used by only one application or the operating system itself.
These data will also "fluctuate based on system needs." This means that temporary data can be written to storage as system data and then deleted by iOS when it is no longer needed.
However, the problem is that you cannot see what data type is used in this category, nor can you delete it.
Generally speaking, other system data may start out as a few GB in size, and depending on how you use your iPhone, it may grow and shrink by a few GB over time.
If this change in data size for other systems continues to trend upward, then bloat issues will come into play. Over time, some users may find that their iPhone's system data takes up a lot of space, perhaps tens of gigabytes.
In the case of one of our writers, the additional system data grew to nearly 85 GB, using up almost all available remaining storage space and causing issues on the device.
It's not clear exactly why this is happening, but it's likely that one or more caches or logs are being added over time, but crucially not being deleted at a rate that can keep up with the writes. Stay away for too long and it can be all-consuming.
With no way to directly see what's causing it or selectively remove problematic system data elements, the user may be left with few available options.
There are some things you can do to reduce the amount of system data being used, they vary in severity and what you must do with your iPhone and its data . This tutorial will start with the least intensive option.
Please remember that these are taken after other reasonable measures, such as deleting unwanted videos or other files to free up space.
Also, remember to back up your iPhone before proceeding. The last thing you want to do is delete valuable data while trying to recover space.
The first approach is to try to reduce cache usage for a select number of Apple-produced apps. This may include caches for Safari and Messages, which sometimes occupy system data categories.
You can manage messages and Safari's cache to try to reduce system data usage. For Messages, this can be as simple as opening Settings, then tapping Messages, scrolling down to Message History, and changing the "Keep Messages" time from "Forever" to a lower number, such as a year or 30 sky.
Clearing the Safari cache is a bit more complicated, but still useful.
If a specific app is causing the problem, if you know which app is wasting space, you can try deleting that app. For example, an application that uses a lot of videos might use such a cache, but would not necessarily delete the cache afterwards.
Uninstalling and deleting apps may wipe some erroneous caches. There is no guarantee that doing so will remove the cache capacity in question that you want to remove, but it should still reduce the cache capacity in use. It is recommended to try uninstalling the application before complete deletion, i.e. deleting the application but keeping your related documents and data.
The core option is to restore your iPhone from backup. This requires backing up all the data on your iPhone, factory resetting the iPhone, and then restoring from the backup.
While you will get all user data back and continue to use the app, you may encounter issues involving the two-factor authentication app and other related issues after the device is set up.
Backing up and resetting your iPhone is the last real option available. In the case of this site's editors, restoring from backup did solve the problem, so it's worth taking the time to do it if you can.
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