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Anyone who owns a smartphone has, sooner or later, encountered a pesky storage full warning. Upon analyzing the device settings, one almost always discovers that a large chunk of the available gigabytes is occupied by a mysterious and inaccessible item. The smartphone other storage (often renamed to “System Data” in newer operating systems like iOS 19 and Android 16) represents a true digital black hole. In this definitive guide, we will technically analyze what makes up this partition, why it tends to swell disproportionately, and, above all, how to free up space in total safety without compromising the device’s operation or losing vital data.
What is ‘Other’ Storage (or System Data) Really?
Before proceeding with cleaning operations, it is fundamental to understand mobile storage architecture. According to official Apple documentation and Google’s guidelines for Android developers, the “Other” category is not a single file, but a dynamic container that groups everything the operating system cannot classify into standard categories (Apps, Photos, Videos, Audio, Documents).
This partition typically includes:
- System and App Cache Files: Temporary data generated by applications to load content faster (e.g., image previews on Instagram or pre-loaded videos on TikTok).
- System Logs and Crash Reports: Text files generated by the kernel and apps to record errors. While useful for developers, for the end user, they are wasted space.
- Database entries and index files: Data used by Spotlight (on iOS) or Android’s internal search engine to quickly find contacts and messages.
- OTA (Over-The-Air) Update Files: Operating system installation packages downloaded in the background waiting to be installed, or remnants of old updates not deleted correctly.
- Offline streaming data: Music tracks or movies downloaded via DRM (e.g., Netflix, Spotify) that the system sometimes struggles to categorize as “Media” due to encryption.
Prerequisites: Preliminary Safety Operations
Since we will be manipulating system files and application caches, the golden rule of computing dictates creating a safety net. Do not skip this step.
- Android Users: Ensure that Google One backup is active (Settings > Google > Backup) and complete a manual backup to Google Drive for WhatsApp.
- iOS Users: Perform a full backup to iCloud (Settings > [Your Name] > iCloud > iCloud Backup > Back Up Now) or, preferably, a local encrypted backup on Mac/PC via Finder or iTunes.
How to Clear ‘Other’ Storage on Android
The Android operating system offers more open file management compared to its Apple counterpart, allowing for more surgical interventions. Here are the step-by-step instructions to recover precious GBs.
1. Clear individual application cache
Unlike iOS, Android allows you to delete the cache of each individual app without having to uninstall it. This is the most effective method to reduce the “Other” item.
- Go to Settings > Apps (or App Management).
- Sort apps by “Size” or look for the ones you use most (Browser, Social Networks, Streaming Apps).
- Tap the desired app, select Storage and cache.
- Tap Clear cache. Warning: do not tap “Clear storage” (or Clear data) unless you want to reset the app to factory state (losing logins and settings).
2. Use the “Files by Google” tool
As highlighted by Google, the official Files app is equipped with an excellent algorithm to identify junk files and system residue.
- Download and open the Files by Google app (often pre-installed on Pixel and Motorola devices).
- Select the Clean tab at the bottom left.
- The app will automatically calculate “Junk files”. Tap Clean [X] MB/GB to delete them safely.
- Also check the “Large files” section to identify old forgotten downloads.
3. Delete residual update files
Sometimes, Android update packages remain in memory. You can force cleaning by restarting the device in Recovery Mode and selecting the Wipe Cache Partition option (the procedure varies by manufacturer, e.g., Samsung, Xiaomi, OnePlus). Note well: starting from Android 13, many manufacturers have removed this option, managing the cache partition dynamically.
How to Clear ‘Other’ Storage on iOS (iPhone)
The Apple ecosystem is notoriously closed (sandboxed). iOS manages “System Data” storage autonomously, but sometimes the algorithm gets stuck. Here is how to force the system to clean up.
1. The Force Restart and Sync Trick
According to official Apple support documentation, iOS is programmed to delete temporary files during a restart. If this is not enough, connecting the iPhone to a computer forces the system to compact logs.
- Connect the iPhone to your Mac (via Finder) or Windows PC (via Apple Devices app or iTunes).
- Unlock the iPhone and authorize the computer.
- Leave the device connected for about 10-15 minutes. During this time, iOS will transfer diagnostic logs to the computer and clear the internal cache to prepare for a potential backup.
- Perform a Force Restart (Press and release Volume Up, press and release Volume Down, hold the Side button until the Apple logo appears).
2. The “Offload App” function
If an app has accumulated too much temporary data, iOS does not offer a “Clear cache” button. The only solution is the so-called Offloading.
- Go to Settings > General > iPhone Storage.
- Scroll through the list of apps and identify those occupying a lot of space under “Documents & Data”.
- Tap the app and select Offload App (NOT “Delete App”). This function uninstalls the app engine but keeps your personal data.
- Reinstall the app by tapping its icon on the Home screen. The cache will have been reset.
3. Clearing Safari and Messages Cache
Safari and iMessage are two of the biggest contributors to “Other” storage.
- Safari: Go to Settings > Safari > Clear History and Website Data.
- Messages: Go to Settings > Messages > Keep Messages and change it from “Forever” to 1 Year or 30 Days. This will delete thousands of old invisible attachments.
The Silent “Devourers”: Focus on Specific Apps
Very often, smartphone other storage is bloated by third-party apps that manage their internal cache poorly. Here are the most common culprits and how to manage them:
Telegram
Telegram saves every photo, video, or GIF viewed on the device to speed up future loading. This can occupy tens of GBs in a few weeks.
- Solution: Open Telegram > Settings > Data and Storage > Storage Usage > Clear Telegram Cache. Also set the “Keep Media” option to a maximum of 1 month or 1 week.
Local backups and corrupt message databases can end up in the system partition.
- Solution: On Android, use a file manager to navigate to Android > media > com.whatsapp > WhatsApp > Databases and delete old backups (keep only the most recent one, usually named msgstore.db.crypt14).
Streaming Apps (Spotify, Netflix, YouTube)
Smart downloads download content in the background based on your preferences. These files are often not read as “Media” by the operating system.
- Solution: Enter the settings of each app and disable “Smart Downloads”, then proceed to clear the internal cache from the appropriate item in the application menu.
Troubleshooting: What to Do If Space Is Not Freed (Last Resort)
Have you followed all the steps, but “Other” or “System Data” storage still occupies 30 GB or more? In this case, we are facing a memory leak or a corrupt system file that the operating system cannot overwrite.
The only technically valid solution, recommended by both Apple support and major Android vendors, is a Factory Reset.
- Ensure you have a complete and updated backup (see Prerequisites section).
- Proceed with the reset (iOS: Settings > General > Transfer or Reset iPhone; Android: Settings > System > Reset options > Erase all data).
- Crucial Step: During the initial setup, avoid restoring the backup immediately. Set up the phone as new, verify that the “Other” storage has returned to normal levels (usually between 2 and 5 GB for basic OS files), and only then import your data. Restoring a corrupt backup could reintroduce the problem.
In Brief (TL;DR)
Smartphone Other storage is a dynamic container that accumulates temporary files, app caches, and system logs, occupying a lot of precious space.
Before starting any deep cleaning operation, it is fundamental to perform a full backup to protect your personal data from accidental loss.
On mobile devices, it is possible to easily recover these gigabytes by clearing application caches or using dedicated tools for the safe removal of junk files.
Conclusions
Managing smartphone other storage does not have to be a mystery. As we have seen, it is simply a physiological accumulation of temporary data, logs, and cache that modern operating systems struggle to dispose of autonomously. By performing periodic maintenance—clearing the cache of the heaviest apps, managing Telegram and WhatsApp media, and forcing log cleaning via strategic restarts—it is possible to keep your device snappy and always have space available for what really matters: your photos, your videos, and your essential applications.
Frequently Asked Questions
This section groups all files that the operating system cannot classify into standard storage categories. It mainly includes temporary application data, system logs for error recording, index files for quick searches, pending update packages, and encrypted offline data from streaming platforms.
To recover space on Android, you can clear the cache of individual applications directly from the device settings without having to uninstall them. Furthermore, it is very useful to use official file management tools to identify digital junk and delete old residual update packages by restarting the phone in recovery mode.
On the Apple operating system, you can force the cleaning of temporary files by connecting the device to a computer for a few minutes and performing a force restart. Another effective method involves using the function to offload the heaviest applications, which uninstalls the program but keeps your personal documents intact.
Widespread programs like Telegram and WhatsApp save every single viewed multimedia content on the device to speed up future loading. To permanently solve the problem, simply access the internal settings of these applications, clear the media cache, and set a strict time limit for the automatic retention of photos and videos.
If system data still occupies tens of gigabytes, you might have a corrupt file that is impossible to overwrite normally. In this case, the definitive solution recommended by manufacturers is a factory reset, remembering to first perform a complete data backup and initially configure the phone as a new device.
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