Storage Full? Free Up Space on iPhone and Android
By Riki Baker · Updated 2 August 2026
The short answer: most "Storage Almost Full" phones are not really full, they are cluttered. Empty the photo bin, offload apps you never open, clear the media hoarded inside WhatsApp, and let the phone tidy its own caches. Ten minutes usually buys you gigabytes back. Below are the exact steps for iPhone and Android, and the one honest sign it is time for a bigger phone rather than another clear-out.
First, where it all goes
You rarely fill a phone with apps. Four things quietly do it, and knowing which lets you win the space back in the right order:
- 1.
Photos and videos. Easily the biggest slice for most people, and a few minutes of 4K video eats more than a hundred apps.
- 2.
Messaging media, WhatsApp above all. Every photo, video and meme in every chat is saved to your phone. On a busy handset it can quietly swallow ten gigabytes or more.
- 3.
App caches and temporary files. Streaming, browsing and social apps stash data to load faster. Useful, until it is not.
- 4.
Deleted files that are not deleted. Photos you binned are held for weeks in a recovery album, still on the clock.
Before you start, back up. A clear-out should never cost you a photo you wanted. Make sure iCloud or Google Photos is syncing, or copy anything precious to a computer first. Our guide to backing up and wiping a phone walks through it if you are not sure.
The biggest quick win: clear WhatsApp media
If you use WhatsApp a lot, this is often the single fastest way to free real space, and hardly anyone does it. WhatsApp saves every photo and video from every chat onto your phone, and it builds up for years. The good news is you can clear it from inside the app without losing your conversations.
- 1.
Open WhatsApp > Settings > Storage and data > Manage storage. On Android, Settings is behind the three-dot menu.
- 2.
It shows your biggest files and lists your chats with the hungriest at the top. Tap Larger than 5 MB, or open a heavy group chat.
- 3.
Tap Select, choose the videos and photos you do not need, and delete them. The chats stay, only the bulky media goes.
To stop it creeping back, turn off Save to Photos (iPhone) or Media visibility (Android), and set Media auto-download to Wi-Fi or off so you are not saving every forwarded clip automatically.
Free up space on iPhone
Work down this list in order. The first three usually do most of the heavy lifting.
See what is actually eating it
Settings > General > iPhone Storage. Give it a few seconds and you get a bar showing exactly what is taking the space, then a list of every app worst-first. Start at the top of that list, not with a guess.
Offload apps you never open
On the same screen, tap an app and choose Offload App to remove the app but keep its documents and data, or Delete App to clear the lot. Turn on Offload Unused Apps and the phone does it automatically. This alone often claws back a few gigabytes.
Empty Recently Deleted photos
The big one people miss. Photos > Albums > Recently Deleted (under Utilities), then Select > Delete All. Photos you thought you deleted are kept here for 30 days and still count against your storage until you clear this album.
Trim old Messages and Safari
Settings > Messages > Keep Messages, switch it to 30 Days to stop years of photos and videos piling up in your texts. Then Settings > Safari > Clear History and Website Data to dump the browser cache.
About that "System Data"
The mysterious "System Data" (older iOS called it "Other") is caches, logs and streaming leftovers. You cannot delete it directly and it is meant to shrink on its own. A restart helps, and offloading or reinstalling a heavy app you have used a lot often clears a stubborn chunk. Do not go chasing it with random cleaner apps.
Let iCloud hold the full-size photos
Settings > Photos > Optimize iPhone Storage keeps smaller copies on the phone and the originals in iCloud. It genuinely frees space, just know the full-resolution version now lives online, so you need a connection to download it.
A tidied phone feels like a new one, faster, calmer, and finally able to install that update.
Free up space on Android
Menus vary a little between Pixel, Samsung and the rest, but the tools are the same underneath.
Open your storage tool
Settings > Storage (or Battery and device care > Storage on Samsung). It breaks down what is using the space and offers a one-tap clean-up. On Pixel and most phones the Files by Google app has a "Clean" tab that suggests junk, big files and duplicates to remove.
Empty the Google Photos Bin
Deleted photos go to the Bin and are kept for up to 60 days, quietly using storage the whole time. In Google Photos: Library (or the Collections tab) > Bin > Empty Bin. Check other bins too, Files by Google and Google Drive each keep their own for about 30 days.
Clear app caches, not app data
Settings > Apps > (pick the app) > Storage and cache > Clear cache. Cache is safe temporary files and clearing it frees space instantly. Avoid "Clear storage" or "Clear data", that wipes the app back to factory and can log you out.
Turn on Smart Storage
On Pixel, Settings > Storage > Smart Storage removes photos and videos from the phone once they are safely backed up to Google Photos and have been on the device for 60 days. Set it and forget it.
The four quick wins, whichever phone you have
Empty the photo bin (Recently Deleted on iPhone, Bin on Android). Deleted photos sit there for weeks, still using space.
Offload apps you never open, and clear the media hoarded inside WhatsApp.
Clear app caches and let the phone tidy its own temporary files.
Back up first, so nothing you actually want disappears with the clutter.
When a clear-out is not the answer
Sometimes the phone really is full, not cluttered. If you have emptied the bins, cleared WhatsApp and offloaded apps and you are still shuffling things around every week, you have simply outgrown the storage. Plenty of older phones shipped with just 64GB, which fills fast with modern photos and apps. That is not a fault to fix, it is a phone to move on from. For reference, most people are comfortable on 128GB and very comfortable on 256GB, which is why Apple has now made 256GB the entry size on the iPhone 17.
You do not need to buy new to fix that. A professionally refurbished phone with plenty of storage costs a fraction of a brand-new one and comes with our 12-month warranty. Right now our refurbished iPhones with 128GB or more start from £396. And when you upgrade with us, we do the part everyone dreads: we move your photos, messages, apps and accounts across and set the new phone up in store, so you walk out ready to go, not facing an evening of logins.
The bottom line
Nine times out of ten, a full phone just needs a ten-minute tidy: empty the photo bin, clear the WhatsApp media, offload the apps you forgot you had, and let it sort its own caches. Do that before you buy anything. If the space vanishes again within a fortnight, you have genuinely outgrown the phone, and a bigger refurbished one is the sensible, affordable fix, with your data carried across for you. Either way you win back the room to actually use your phone, without paying new-phone money to do it.
Freeing up phone storage: your questions answered
Why is my phone storage full when I have deleted everything?
Almost always because the files are not really gone yet. Deleted photos sit in Recently Deleted on iPhone for 30 days and in the Bin on Android for up to 60 days, still using space until you empty those albums. The other usual suspects are app caches and, on iPhone, the "System Data" that holds temporary files. Empty the photo bin first, then clear app caches, and the number usually drops sharply.
How do I free up space taken by WhatsApp?
Open WhatsApp > Settings > Storage and data > Manage storage. It shows your biggest files and your chats worst-first. Open a heavy chat, or the "Larger than 5 MB" view, select the photos and videos you do not need and delete them. To stop it filling up again, turn off Save to Photos (iPhone) or Media visibility (Android) and set Media auto-download to Wi-Fi or off. Group chats full of forwarded videos are usually the worst offenders.
What is "System Data" or "Other" storage on my iPhone?
It is the catch-all for caches, logs, Siri voices and streaming leftovers, the stuff no single app owns. Apple does not let you delete it directly and it is designed to shrink on its own when the phone needs room. A restart helps, as does offloading or reinstalling an app you stream or browse in heavily. Ignore cleaner apps that promise to purge it by the gigabyte, they cannot do what they claim.
Is it safe to clear an app cache?
Yes. On Android, "Clear cache" only removes temporary files the app can rebuild, so it frees space with no real downside. Just avoid "Clear storage" or "Clear data", which resets the app and can sign you out. iPhone has no per-app cache button, so you offload or delete and reinstall the app instead.
Should I turn on Optimise iPhone Storage?
It is one of the most effective switches if photos are your problem. It keeps space-saving copies on the phone and the full-resolution originals in iCloud. The trade-off is that you need an internet connection to pull down a full-size photo, and it uses your iCloud allowance, so keep an eye on whether the free 5GB is enough for you.
How much storage do I actually need on a phone?
For most people 128GB is comfortable and 256GB is plenty even with a big photo library. Older phones often shipped with just 64GB, which fills fast today, and Apple has now dropped 128GB as its entry size, with the iPhone 17 range starting at 256GB. If you are constantly fighting a 64GB phone, that is the sign you have outgrown it rather than a problem you can tidy away.
Outgrown your phone, not just cluttered it?
Move up to a bigger refurbished phone for less than new, with a 12-month warranty, and let us carry all your data across for you.