If your phone is out of storage, start by deleting unwanted downloads and duplicates, clearing app caches, and moving photos and videos to the cloud or a computer. Before deleting anything, make sure the files you need have been copied so you can free up space without losing important data.
Don’t rush to erase everything: some of your storage is taken up by temporary files, while the rest may be personal photos, messages, and documents. This article explains how to find safe ways to clear space and what to check before deleting data.
| Item | What to do | Risk |
|---|---|---|
| App cache | Clear it using the built-in option | Temporary files will be downloaded again |
| App data | Check local files and account sign-in | Settings and documents may be deleted |
| Photos and videos | Check the cloud copy first | Deleting synced items may also affect the cloud |
| Downloads | Sort and check each file | You could delete a document you need |
| System folders | Don’t delete them manually | Apps or the system may malfunction |
- 2 different Android actions not to confuse: clearing cache and clearing data
- 2 places to check for a copy: a cloud service and another device
- 0 guaranteed extra gigabytes: the result depends on which files are taking up storage
How can you find out what’s taking up your phone’s storage?
Start with the storage screen
You can see what’s taking up your phone’s storage in Settings: on an iPhone, go to “Settings” → “General” → “iPhone Storage”; on Android, find the “Storage” section. The iPhone screen shows how much space is used and breaks it down by data category; on Android, the name and location of the setting depend on the manufacturer and system version.
Compare the categories to decide where to look for files you don’t need:
- “Photos and videos” — check whether large videos are taking up a lot of space.
- “Apps” — find out which apps and their data are using storage.
- “Files” and “System” — distinguish saved documents from system data.
Next, check large folders
The “Downloads” folder may contain documents and installation files stored separately from your photo gallery. Open the Files app on iPhone or a file manager on Android, and check the contents of that folder in particular.
If the “Apps” category is using a lot of space, start by checking the data for individual apps; if “Photos and videos” stands out, review your largest videos. First find out where the files are stored, then decide what to delete. That way, you’re less likely to mistake a document or app data for a photo.
How can you find large videos, downloads, and duplicates?
A file manager is an easy way to find large videos, downloads, and duplicates: sort items by size if that option is available, then check large videos, archives, and the Downloads folder. Open each file before deleting it to make sure you no longer need it: a file’s size alone doesn’t tell you whether its contents are important.
Review photos and videos in Google Photos. On iPhone, open the Photos app and check your albums and recently deleted items. Don’t look for duplicates by filename alone: compare the images or documents themselves, since files with the same name aren’t necessarily identical.
Check media in messaging apps
Look for attachments and downloaded media separately in each messaging app, as they may store copies of photos, videos, and documents. If you want to free up space but keep your chat history, delete specific files you don’t need rather than the entire conversation.
What’s safe to delete: cache or user data?
Clearing the cache is safer. Clear user data only if you’re prepared to lose local files, settings, or your account sign-in. On Android, choose “Clear cache,” not “Clear data” or “Clear storage.” On iPhone, consider “Offload App” if the option is available.
Cache and data aren’t the same thing.
- App cache consists of temporary files. Clearing it usually doesn’t delete documents, but the app may need to download images and other files again.
- “Clear data” and “Clear storage” on Android aren’t ways to clear the cache. They may delete settings, local files, and account sign-in data, so check that anything you need is saved elsewhere before tapping either option.
- “Offload App” on iPhone frees up space while keeping documents and data, if the app supports this feature. It’s not the same as manually deleting the documents themselves.
Don’t manually delete Android folders or system files unless you know what they’re for. The space you free up isn’t worth the risk of damaging app files or disrupting the system. Stick to the clear-cache option in the settings for the specific app.
How can you free up space without losing photos?
Check the copy before deleting the original
You can free up storage and keep your photos only if you make sure the files you need have already been copied to the cloud or a separate storage device, then delete only the copies on your phone. Having a cloud service app installed doesn’t mean the upload is complete: check your photos and videos from another device or in the service itself.
Before deleting anything, find out how syncing works: deleting a file on your phone may also delete it from your cloud library. First check whether you’re deleting a local copy or the original. If you’re not sure, leave the file alone until you’ve confirmed it’s available in the cloud.
- Cloud copy: Open the service on another device or in its app and check that the photos and videos you need are there.
- Copy on a computer or external drive: Save especially important documents separately and open a few files. This checks not only that the copy exists but also that the files can be read.
When won’t clearing storage help, and when can it cause problems?
What not to delete manually
Clearing storage can be ineffective or harmful if you manually delete system files or use an unfamiliar app that can access your personal data: doing so may disrupt your phone or result in lost files. If “System” is taking up a lot of space, restart your device and check storage again. Don’t try to free up space by deleting system folders.
- App cache. Clearing it may free up space temporarily, but temporary files will be recreated as you use the apps.
- Apps and accounts. Deleting an app doesn’t necessarily erase account data or backups. Reinstalling it also doesn’t guarantee that local documents will be restored.
- “Cleaner” apps. Unfamiliar apps with broad access to files and photos may affect your personal data. Check permissions before installing one; use the built-in iOS or Android tools to clear storage.
On iPhone and Android, it’s safer to check which data is using storage in the settings than to delete unfamiliar files manually. Before deleting an app, make sure separately that the documents you need are saved: having an account or a backup doesn’t by itself confirm that local files can be restored.
How can you check the results after clearing storage?
Check the results in your phone’s storage settings: compare the storage categories before and after deleting files, then open important photos and documents individually. On iPhone, go to iPhone Storage in Settings; on Android, open the device’s Storage settings.
Check photos in your gallery by opening a few important images, not just their thumbnails. Find documents in the app you normally use and make sure they open. If you freed up space by deleting downloads from a messaging app, go to the relevant chat and check that your messages and important attachments are still available.
Before clearing storage again, check your backup once more: sync settings and available cloud space may have changed. Make sure syncing for the photos and documents you need is on, and that your cloud storage has enough room for a copy.
Frequently asked questions
Can I delete an app’s cache?
If I can see a photo in a cloud app, can I delete it from my phone?
Why does storage fill up again so quickly after I clear the cache?
Should I manually delete Android folders?
