A “storage full” warning shouldn’t stop you taking photos or installing updates. The quick answer on how to free up storage on phone: find the biggest space hogs, remove what you don’t use, and back up photos first.
This guide sits within our wider coverage of mobile phones and gadgets, and it covers both Android and iPhone.
| Item | Value |
|---|---|
| Android Files app Trash retention | 30 days |
| iPhone Recently Deleted folder retention | 30 days |
| iCloud free storage | 5 GB |
| Google Photos free storage | 15 GB |
| Dropbox free storage | 2 GB |
These figures come from Popular Science’s May 2026 guide and Asurion’s storage guide. Trash periods and free cloud tiers can change, so check the source before you rely on them.
Check what is eating your storage first
Before you delete anything, look at the breakdown. On Android, open Settings, tap Storage and select a category, as Google’s Android help page describes.
Some Samsung phones put the same screen under Battery and device care, according to Asurion. Menu names vary by maker, so look for a Storage option if the path differs.
On an iPhone, go to Settings, then General, then iPhone Storage, as Popular Science explains. Scroll down and the installed apps are listed with the biggest at the top, which makes the worst offenders easy to spot.
It also helps to know that storage and memory are different things. Google says storage is where you keep data such as music and photos, while memory is where apps and the system run, so a full phone is a storage problem rather than a memory one (Google).
Clear downloads, duplicates and forgotten files
Old downloads are usually the quickest win. Work through these spots in order:
- Android Downloads folder: open the Files app, which Popular Science calls a good starting point, and delete what you no longer need.
- Files app Clean tool: from the menu, choose Clean to see suggestions such as duplicate files and screenshots. The options vary by device.
- iPhone Files app: tap Browse, then On My iPhone, and long-press a file to delete it.
- Offline media: check downloads in apps such as Spotify and Netflix, and use their remove-downloads options.
- Old messages and voicemails: Asurion notes these can take up surprising amounts of space.
Deleted files do not vanish at once. On Android, a file sent to Trash stays there for 30 days before it is wiped, and on iPhone the Recently Deleted folder also holds files for 30 days, according to Popular Science. Empty those folders if you need the space immediately.
If you want a file manager to do the hunting, Asurion lists Files by Google as one that scans and suggests storage-saving actions.
Offload, archive or uninstall apps you rarely open
Apps are the next big target. Asurion suggests asking whether you really need a separate app if the same service works through a website (Asurion).
iPhones have Offload Unused Apps, which has existed since iOS 11 launched in 2017. It removes the bulk of the app but keeps your settings and documents, and as of Popular Science’s October 2023 guide it is off by default and can be switched on under Settings, General, iPhone Storage (Popular Science).
Android’s version is called Auto Archive. Google says it can free up to nearly 60 percent of an app’s storage without removing the app or its data, and as of the same October 2023 report it is not enabled by default and only kicks in when space runs low (Popular Science).
If you would rather remove an app completely, you can download it again later. Google says you don’t have to buy a paid app again.
Cache versus app data
Android lets you clear an app’s cache or its storage, and the two are not the same. Clear cache deletes temporary data, so some apps may be slow the next time you open them, while Clear storage permanently deletes all app data (Google). Try to delete data from inside the app first.
Fewer unused apps can also help in other ways, and our guide on how to improve smartphone battery life covers the habits that go with a tidy phone.
Move photos and videos off the phone safely
Photos and videos usually take the largest share of space. On Android, Google’s Smart Storage setting automatically clears backed-up photos and videos when storage is almost full. Find it under Storage, Free up space, then the menu’s Settings, and note that some of these steps only work on Android 14 and up (Google).
You can also do it by hand. In Google Photos, the Free up space on this device option deletes local copies that are already backed up, and on iPhone the Optimize iPhone Storage option keeps lower-resolution versions locally if you sync to iCloud (Popular Science).
Cloud backup needs room too. Asurion lists iCloud at 5 GB of free storage, Dropbox at 2 GB and Google Photos at 15 GB (Asurion).
Don’t treat the cloud as your only copy. Popular Science advises keeping another backup somewhere else, such as a laptop, in case anything happens to your cloud files (Popular Science). Google also notes you can copy files to a computer with a USB cable and then delete them from the phone (Google).
Build a short routine so it doesn’t fill up again
A few minutes now and then beats a panicked clean-up. Try this order:
- Open your storage screen and note which category is largest.
- Delete old downloads, duplicates and screenshots.
- Offload or uninstall apps you haven’t opened for a while.
- Back up photos and videos, then free up the local copies.
- Empty Trash or Recently Deleted if you need the space straight away.
If none of this is enough and you are shopping for a replacement handset, the display is another choice to weigh, and the explainer on oled vs lcd is a good place to start.
Frequently asked questions
Is it safe to delete photos after backing them up?
Show answer
It is safe once you have confirmed the backup is complete, but keep a second copy elsewhere. Popular Science advises not relying on cloud copies alone.
Will I lose an app if I offload or archive it?
Show answer
No. On iPhone, offloading keeps your settings and documents, and on Android, Auto Archive leaves the app and its data on the device, according to Popular Science‘s October 2023 report.
Does clearing an app’s cache delete my data?
Show answer
No. Clearing the cache removes temporary data, while Clear storage permanently deletes all app data, so choose carefully (Google).
Why is my phone still full after I delete files?
Show answer
Deleted items may still sit in Trash or Recently Deleted for 30 days before they are wiped, as Popular Science explains. Empty those folders to get the space back sooner.
