iPhone Storage Full? How to Check Storage, Clear Cache and Free Space
To check iPhone storage, open Settings > General > iPhone Storage. The bar shows what is using space, and the list below shows each app from biggest to smallest. This guide shows how to clear cache, cut down WhatsApp and photos, deal with System Data, and pick the right storage when you buy your next iPhone.
Updated 11 November 2026
How to check storage on iPhone
Go to Settings > General > iPhone Storage. Give it a few seconds to calculate. You will see: - a coloured bar for Apps, Photos, Media, Messages, iOS and System Data - recommendations such as 'Offload Unused Apps' or 'Review Large Attachments' - every app sorted by size, with app size and documents and data shown separately
You can also see total capacity and free space in Settings > General > About. If free space is below about 10% of your total, the iPhone may slow down and updates may fail.
How to clear cache on iPhone
iPhones do not have one 'clear cache' button, but you can clear it app by app: - Safari: Settings > Apps > Safari > Clear History and Website Data. - Chrome and other browsers: inside the app's settings, clear browsing data. - Instagram, TikTok and Facebook: cached videos are part of 'Documents and Data'. The reliable way to clear them is to delete the app and install it again; your account stays safe if you know your login.
Restarting the iPhone also clears some temporary files.
WhatsApp storage: the biggest space eater
For many users in Pakistan, WhatsApp is the largest app on the phone. To shrink it: 1. In WhatsApp, open Settings > Storage and Data > Manage Storage. 2. Review 'Larger than 5 MB' and forwarded files, and delete what you do not need. 3. Open big group chats and clear media. 4. Turn off auto-download for videos on mobile data. 5. In Settings > Chats, turn off 'Save to Photos' so every received picture is not copied twice.
This alone can free several gigabytes.
Photos and videos without losing memories
- Empty the Recently Deleted album in Photos; deleted photos stay there for 30 days.
- Use the Duplicates album in Photos > Utilities to merge copies.
- Turn on iCloud Photos with 'Optimize iPhone Storage' to keep full originals in iCloud and smaller versions on the phone. This needs enough iCloud storage.
- Copy videos to a computer or Google Photos, then delete them from the phone.
- In Settings > Camera > Record Video, choose 1080p instead of 4K for everyday clips.
What is System Data, and how to reduce it
System Data (once called 'Other') includes caches, logs, Siri voices and temporary files. It grows and shrinks on its own. To reduce it: - Restart the iPhone. - Delete old message threads and large attachments in Messages. - Clear Safari data and reinstall apps that stream a lot of video. - Update to the latest iOS.
If System Data stays very large, back up and use Erase All Content and Settings, then restore. Our guide on how to restart and reset an iPhone (How to Restart, Force Restart and Reset Your iPhone (Network and Factory Reset)) shows the steps.
Offload apps and other quick wins
- Offload Unused Apps: Settings > Apps > App Store. iOS removes apps you do not use but keeps their data, and reinstalls them with one tap.
- Delete downloaded Netflix, YouTube and Spotify content you have already watched or heard.
- Remove old voice notes and large files in the Files app.
- In Messages, set Keep Messages to 1 year.
Do not install 'cleaner' apps that promise magic results. iOS does not allow them to clean other apps, and many just show ads.
How much iPhone storage should you buy?
There is no memory card slot on any iPhone, so choose carefully: - 128GB: fine for light users who keep photos in iCloud or Google Photos. - 256GB: the right choice for most people, especially with WhatsApp, games and 4K video. - 512GB and above: creators who shoot ProRes or lots of 4K.
The iPhone 17 (iPhone 17), iPhone 17e (iPhone 17e) and iPhone 18 Pro (iPhone 18 Pro) start at 256GB. Our used iPhone 13 (iPhone 13) and iPhone 15 Pro Max (iPhone 15 Pro Max) come in larger sizes too; see 256GB mobiles (256GB Mobiles).
Storage on a used iPhone: what to check
When buying a second hand iPhone, confirm the storage in Settings > General > About > Capacity, because sellers sometimes list the wrong size. A phone with very little free space after a fresh setup is unusual and worth questioning. Every iPhone we sell is 100% genuine Non PTA (factory unlocked), the storage is listed on each card, and every iPhone is slightly used with 100% battery health. Run your checks during the 7-day checking warranty; the used iPhone buying checklist (Used iPhone Buying Checklist for Pakistan) helps.
