You open your iPhone's storage settings to figure out why your phone refuses to take new photos or install updates. You delete videos, clear out hundreds of photos from "Recently Deleted", and uninstall unused games. Yet, the storage bar remains full.
When you scroll all the way to the bottom of the storage breakdown, you find the culprit: System Data (previously called "Other" in older iOS builds) eating up an unbelievable 25 GB, 40 GB, or even 70 GB of space.
The worst part? There is no simple "Delete" button next to it. Before you give in to frustration and wipe your entire phone, follow this step-by-step guide to reclaim your gigabytes safely.
Clear Safari & Web Browser Caches
If you browse frequently on Safari, Chrome, or social media in-app browsers, website cookies, preview images, and offline scripts quietly pile up inside System Data.
- Tap Clear History and Website Data.
- Choose the timeframe as All history and toggle Close all tabs to ON.
- Tap Clear History to confirm.
- If you also use Google Chrome or Brave, open those apps, head into their internal settings, and tap Clear Browsing Data.
Flush In-App Streaming Caches (Spotify, TikTok, Netflix)
Streaming apps store gigabytes of temporary buffer files so videos and music load instantly. Strangely, iOS often accounts for these third-party stream caches inside System Data rather than the app's individual storage bar.
- In Spotify: Go to Settings ➔ Storage ➔ Clear Cache. This deletes cached temporary audio files without deleting your downloaded playlists.
- In TikTok: Go to Profile ➔ Settings & Privacy ➔ Free up space ➔ Clear Cache. TikTok alone frequently hogs 5 GB to 10 GB of ghost cache.
- In Telegram / WhatsApp: Go to Settings ➔ Data and Storage ➔ Storage Usage and clear cached media that is already saved in the cloud.
Trim Message History & Ghost Attachments
By default, iMessage is configured to store every text, high-res meme, and 4K video attachment you've ever received Forever. Over the years, these accumulate in system indexes.
- Change the setting from Forever to 1 Year or 30 Days if you don't need years of text logs.
- Next, go to Settings ➔ General ➔ iPhone Storage ➔ Messages.
- Tap Review Large Attachments and delete heavy videos and files you no longer need.
The "Date Change" Cache Purge Trick
This is a proven community workaround. iOS is programmed to keep temporary logs until a specific expiration date. By temporarily tricking your phone's clock into the future, you force iOS internal maintenance daemons to treat pending log files as expired and delete them immediately.
- Turn on Airplane Mode (this prevents any sync conflicts with iCloud or messaging apps).
- Go to Settings ➔ General ➔ Date & Time.
- Toggle off Set Automatically.
- Manually advance your phone’s calendar 1 to 2 months into the future.
- Lock your phone and wait 60 seconds.
- Re-open Settings ➔ General ➔ iPhone Storage and check the bottom of the screen. In many cases, System Data drops significantly.
- Important: Go back to Date & Time, toggle Set Automatically back to ON, and turn off Airplane Mode.
The Computer Sync Trick (Most Reliable Fix)
If your System Data is still occupying 30+ GB, this is the most reliable trick that Apple technicians use. Connecting your iPhone to a computer forces iOS to perform a deep diagnostics check and dump corrupt cache files.
- Connect your iPhone to a Mac (via Finder) or a Windows PC (via iTunes or the Apple Devices app) using a USB cable.
- Unlock your iPhone and tap Trust This Computer if prompted.
- In Finder or iTunes, select your iPhone and click Sync or Back Up Now.
- Let the backup finish completely. During this process, the computer reads the file system and forces iOS to flush stuck update files and dead caches.
- Disconnect the cable and check your iPhone storage—you will often see 15 GB to 30 GB returned to your available space.
Frequently Asked Questions
What is a normal amount of System Data on an iPhone?
Between 5 GB and 15 GB is completely normal. System Data will never drop to zero because iOS requires a few gigabytes for core operating logs, Siri databases, and active app state files.
Why didn't my storage change immediately after deleting photos?
Deleted photos stay in the "Recently Deleted" album for 30 days. You must open the Photos app, scroll down to Recently Deleted, and tap Delete All. Afterwards, restart your phone so the storage graph refreshes.
Will syncing with my computer delete anything from my iPhone?
No. Standard syncing simply updates local backups and synchronizes media. It cleans up temporary crash logs and orphan files without erasing your personal data.
