How to Free Up Storage on iPhone and Android (Step-by-Step)

That "Storage Almost Full" warning always shows up at the worst moment: right before you record a video, install an update or snap the photo you actually care about. The good news is that you rarely need to delete anything important. Most phones are clogged with duplicate photos, apps you forgot about, years of old message attachments and temporary files that pile up quietly. This guide walks you through exactly where to tap on both iPhone and Android, which fixes free the most space, and how to keep your phone from filling up again.

Step 1: Find Out What Is Actually Using Your Space

Before you delete anything, look at the breakdown. It takes 30 seconds and tells you where the real problem is.

• iPhone: open Settings > General > iPhone Storage. A colored bar shows space used by Apps, Photos, Messages, iOS and "System Data," followed by a list of apps sorted by size. iOS also shows recommendations here, such as reviewing large attachments.
• Android: open Settings > Storage (on Samsung Galaxy phones, look under Device care or Battery and device care > Storage). You will see categories like Images, Videos, Apps, Audio, Documents and System.

For most people, photos and videos are the largest category, followed by a handful of heavy apps such as messaging apps, games, streaming apps with downloads, and social media apps with big caches.

Step 2: Clean Up Photos and Videos

A single minute of 4K video can take hundreds of megabytes, so this is where you will usually win back the most space.

On iPhone

1. Delete duplicates: in the Photos app, scroll to Utilities > Duplicates (available on recent versions of iOS) and merge the copies.
2. Review videos first: in Photos, open Media Types > Videos and delete long clips you do not need. Ten old videos can free more space than a thousand photos.
3. Empty Recently Deleted: deleted items stay in Recently Deleted for 30 days. Open it under Utilities, tap Select > Delete All to free the space immediately.
4. Turn on Optimize Storage: go to Settings > [your name] > iCloud > Photos, enable iCloud Photos, and choose Optimize iPhone Storage. Full-size originals live in iCloud and the phone keeps smaller versions.

On Android

1. Use Google Photos "Free up space": once your photos are backed up, open Google Photos, tap your profile picture and choose Free up space. It removes only the copies on your phone that are already safely backed up.
2. Empty the Trash or Bin: Google Photos and the Samsung Gallery app both keep deleted items for a period before removing them. Empty it manually to get the space back now.
3. Delete blurry shots and screenshots: the Files by Google app groups screenshots, large files and duplicates so you can clear them in a few taps.

Step 3: Offload, Archive or Delete Unused Apps

Look at your app list sorted by size and be honest: when did you last open that game or that airline app?

iPhone: Offload Unused Apps

Offloading removes the app itself but keeps its documents and data, so if you reinstall it later you pick up where you left off. To offload one app, tap it in Settings > General > iPhone Storage and choose Offload App. To let iOS do it automatically, go to Settings > Apps > App Store and turn on Offload Unused Apps (on older iOS versions the switch is under Settings > App Store). The app icon stays on your Home Screen with a small cloud symbol; tap it to download it again.

Android: Archive Apps

Newer Android versions offer a similar feature called archiving, which removes most of an app while keeping your data and the icon. Depending on your phone, open Settings > Apps, choose an app and tap Archive. The Google Play Store can also archive apps automatically when space runs low; look for Automatically archive apps in the Play Store's settings under General. If you do not see the option, your phone may not support it yet, so simply uninstall apps you no longer use.

Step 4: Clear Message Attachments and Chat Media

Texting apps quietly store every photo, video, voice note and meme anyone has ever sent you.

• iPhone Messages: go to Settings > Apps > Messages (or Settings > Messages on older iOS) and set Keep Messages to 30 Days or 1 Year instead of Forever. In iPhone Storage, tap Messages to review large attachments and delete them individually.
• WhatsApp (iPhone and Android): open Settings > Storage and Data > Manage Storage. You can review files larger than 5 MB and see which chats use the most space, then delete in bulk. Turning off automatic media download in the same menu stops the pile from growing.
• Google Messages and Samsung Messages: open a busy group chat, view its shared media, and delete large videos you have already saved elsewhere.

Step 5: Clear Cache and Junk Files

Cache is temporary data apps save to load faster. It is safe to clear, but it will build up again over time.

• Android: open Settings > Apps, pick a heavy app such as Chrome, Instagram or TikTok, tap Storage and then Clear cache. Avoid "Clear storage" or "Clear data" unless you want to reset the app and sign in again. The Files by Google app also has a Clean tab with a "Junk files" card you can clear in one tap.
• iPhone: iOS does not offer a single "clear cache" button. For Safari, go to Settings > Apps > Safari > Clear History and Website Data. For other apps, check their own settings for a cache option, or offload and reinstall the app, which removes its temporary files.

A related trick: delete downloaded episodes, playlists and offline maps in apps like Netflix, Spotify, YouTube and Google Maps. These downloads can easily take several gigabytes.

Step 6: Move Files to the Cloud or a Memory Card

If you have already trimmed what you can, the next step is to store your files somewhere other than the phone.

Option	Free space included	Works best on	Good for
iCloud	5 GB	iPhone, iPad, Mac	Photos, backups, iCloud Drive files
Google Account (Photos, Drive, Gmail)	Up to 15 GB, shared	Android and iPhone	Photos and documents on any device
microSD card	You buy the card	Android phones with a card slot	Music, videos, photos, offline files
Computer or external drive	Your drive's capacity	Any phone with a cable	Long-term photo and video archives

Many budget and mid-range Android phones still have a microSD slot, while iPhones and many flagship Android phones do not. On a phone with a slot, set the camera to save to the card and move large media files there using Files by Google or your phone's file manager. Before relying on any single location, keep at least two copies of photos you cannot replace.

Step 7: Restart and Update

"System Data" (iPhone) or "System" and "Other" (Android) includes logs, caches and temporary update files. A simple restart often shrinks it, because the system clears some temporary files. Keeping your phone updated also helps, since an update stuck halfway can leave a large downloaded file behind. On iPhone, if a downloaded update is sitting in iPhone Storage, you can tap it and delete it, then download it again when you are ready to install.

How to Stop Your Phone From Filling Up Again

• Turn on automatic cloud backup with storage optimization for photos.
• Switch off automatic media downloads in WhatsApp and other chat apps.
• Set iPhone Messages to keep messages for 1 year instead of forever.
• Turn on automatic offloading (iPhone) or archiving (Android).
• Do a five-minute cleanup once a month: videos, screenshots, downloads and unused apps.
• Aim to keep around 10 to 15 percent of storage free so updates install smoothly and the phone stays responsive.

Related reading: How to create a Gmail account, how to spot a phishing email and How to pick a budget smartphone.

Frequently Asked Questions

Will deleting photos from my phone delete them from the cloud too?

It depends on the service. With iCloud Photos turned on, deleting a photo on your iPhone deletes it from iCloud and every other device signed in. In Google Photos, deleting a backed-up photo from the app also removes it from your account, but the Free up space option removes only the phone copy. When in doubt, check the cloud version in a web browser before deleting.

Is it safe to clear the cache?

Yes. Clearing cache removes temporary files only, not your account, photos or messages. The app may load a little slower the first time afterward. "Clear data" or "Clear storage" is different: it resets the app completely.

What is "System Data" and can I delete it?

System Data covers caches, logs, temporary files and other items iOS manages itself, and you cannot delete it directly. Restarting the phone, clearing Safari data, deleting large message attachments and offloading heavy apps usually reduce it.

Do "phone cleaner" apps actually help?

Most are unnecessary and some push ads or ask for broad permissions. The built-in storage tools, Files by Google on Android and the settings described above do the same job safely.

What is the difference between offloading and deleting an app?

Deleting removes the app and its data. Offloading (iPhone) or archiving (Android) removes the app but keeps your data and the icon, so reinstalling brings everything back.

How much free space should I keep?

There is no official number, but keeping roughly 10 to 15 percent free leaves room for system updates, new photos and app caches without constant warnings.

Conclusion

You can usually recover several gigabytes in 15 minutes: check the storage breakdown, clear old videos and empty the trash, offload or archive unused apps, trim chat media and move your photo library to the cloud or a memory card. Do a quick monthly cleanup and that "Storage Almost Full" warning should become a rare sight.