How to Free Up Space When Your Phone Cannot Update
2026-10-14 · Marion Phone Repair
Your phone is telling you it cannot install an update because there is not enough storage space. System updates on both iPhone and Android require free space to download the update file and then additional temporary space to install it — often 2 to 5 GB for a major update. If your phone is nearly full, even a small update may fail. Here is how to find what is consuming your storage and free enough space to get that update installed.
How to check what is using your storage
iPhone
Go to Settings, General, iPhone Storage. This screen shows a color-coded bar at the top breaking down storage by category (Apps, Photos, Media, System Data, Other) and below it, a list of every app sorted by size. The loading takes a moment — wait for the full list to populate before making decisions. Pay attention to:
Apps: Each app shows its total size, split between the app itself and its Documents and Data. An app that is 50 MB but has 3 GB of Documents and Data is storing a lot of cached content
System Data (previously called Other): This category includes caches, logs, and temporary files. If it is unusually large (over 5 GB), a restart or restoring the phone can reclaim this space
Photos and Videos: Usually the largest category. A single minute of 4K video uses approximately 400 MB
Android
Go to Settings, Storage. This shows a breakdown of storage usage by category. Tap each category to see details. On Samsung phones, go to Settings, Battery and Device Care, Storage for a similar breakdown. Key categories to check:
Apps: Shows total space used by all apps. Tap it to see individual app usage
Images and Videos: Your photo and video library, usually the biggest consumer
Audio: Downloaded music, podcasts, and voice recordings
Documents and Other Files: Downloaded files, PDFs, and documents from messaging apps
System: The operating system itself. You cannot reduce this
Quick ways to free space
Delete old photos and videos (or back them up first)
Photos and videos are almost always the biggest storage consumer. Before deleting, back them up:
Google Photos: Install Google Photos and enable backup. Photos and videos upload to your Google account (15 GB free across all Google services). Once backed up, you can delete them from the phone — Google Photos has a Free Up Space option that removes local copies of already-backed-up media
iCloud Photos (iPhone): If you have iCloud storage, enable Optimize iPhone Storage in Settings, Photos. This keeps full-resolution photos in iCloud and stores only smaller versions on the phone, reclaiming significant space
Manual backup: Connect the phone to a computer and copy photos and videos to the computer's hard drive. Then delete them from the phone. Empty the Recently Deleted album afterward — deleted photos stay there for 30 days, still using storage
Clear app caches
Apps store cached data to load faster — images, videos, webpage data, and temporary files. This cache can grow very large over time:
Android: Go to Settings, Apps, select an app, Storage, and tap Clear Cache. This removes temporary data without deleting your account data or settings. Do this for your largest apps — social media apps (Instagram, TikTok, Facebook) and browsers often cache gigabytes of data
iPhone: iOS does not have a universal clear-cache option. For most apps, you need to delete and reinstall the app to clear its cache. For Safari, go to Settings, Safari, Clear History and Website Data. For individual apps, check within the app's own settings for a clear cache option
Delete apps you do not use
Scroll through your app list and honestly assess which apps you have not opened in months. Games you finished, apps you tried once, duplicate apps (two weather apps, two note apps) — delete them. On iPhone, the iPhone Storage screen shows the last time each app was used, making this easy to evaluate.
Offload unused apps (iPhone)
iPhone has a feature called Offload Unused Apps (Settings, General, iPhone Storage, or Settings, App Store). This removes the app binary but keeps its documents and data. If you reinstall the app later, your data comes back. This saves space on apps you rarely use without losing your settings and saved data.
Clear messaging app storage
Messaging apps accumulate media rapidly. Every photo, video, GIF, and voice message sent or received in WhatsApp, Messenger, iMessage, and other messaging apps is stored on your phone:
WhatsApp: Settings, Storage and Data, Manage Storage. Shows total storage used and lets you review and delete large files and frequently forwarded media
iMessage: Go to Settings, General, iPhone Storage, Messages. It breaks down storage by conversations, photos, videos, and other attachments. You can delete large conversations or specific attachment types
Telegram: Settings, Data and Storage, Storage Usage. Lets you set automatic media deletion after a period and clear cached media
Delete downloaded content
Check for offline content you downloaded and forgot about:
Netflix, YouTube, Spotify, and podcast apps download content for offline use. Check each app's downloads section and remove content you have already watched or listened to
Check your Downloads folder. On Android, use the Files app to find and manage downloads. On iPhone, check the Files app under the Downloads folder
How to install the update with minimal free space
Update through a computer
If you cannot free enough space on the phone itself:
iPhone: Connect to a Mac or PC. On Mac (macOS Catalina or later), open Finder and select the iPhone. On Windows or older macOS, open iTunes. Click Check for Update, then Download and Update. Updating through a computer requires less free space on the phone because the update file is downloaded to the computer rather than the phone
Android: Some manufacturers offer desktop tools (Samsung Smart Switch, for example) that can update the phone through a USB connection. Check your manufacturer's support page
Delete and re-download after updating
If you need to delete content to make room for the update, remember that most content can be re-downloaded after the update completes. App purchases, music purchases, and cloud-synced photos can all be restored. The goal is to create temporary space for the update — you are not losing anything permanently as long as it is backed up or available for re-download.
Preventing the problem
Enable automatic cloud backup for photos: Google Photos or iCloud Photos keeps your media backed up so you can safely remove local copies when space gets tight
Periodically review large apps: Check storage usage every few months and clear caches or delete unused apps before storage becomes critical
Choose the right storage size: When buying a new phone, consider that app sizes and photo file sizes increase every year. A 64 GB phone that feels roomy today may be cramped in two years. 128 GB is the practical minimum for most users in 2026
Storage help in Marion
If your phone is full and you need help backing up photos, clearing space safely, or getting an update installed without losing important data, Marion Phone Repair can back up your content, clean up storage, install the pending update, and set up automatic backup so the problem does not recur.