How to Free Up Storage on Android
Short answer
Open Settings → Storage to see the breakdown by category, then work down from the largest. Clearing an app's cache is always safe; clearing its data resets the app and logs you out. The biggest wins are usually WhatsApp media, offline downloads in streaming apps, and photos already backed up to the cloud.
On this page
Android tells you exactly what is using your storage, in more detail than iOS does. The problem is that the most useful screen is two taps deep, the path differs between Samsung and Pixel, and the one button people reach for — Clear data — is the one that causes damage.
Here is the sequence that actually recovers space, in order of payoff, with the cache-versus-data distinction made clear up front because it is the thing that catches people out.
Look at the breakdown first
The path depends on your manufacturer:
| Phone | Path |
|---|---|
| Pixel / stock Android | Settings → Storage |
| Samsung (One UI) | Settings → Battery and device care → Storage |
| OnePlus, Oppo, Xiaomi | Settings → About phone → Storage, or Settings → Storage |
If you cannot find it, search “storage” in the Settings search bar — that works on every version.
You get a breakdown by category: Apps, Images, Videos, Audio, Documents, and System. Samsung’s version is more granular and includes a Trash entry that holds deleted photos for 30 days — those still count against your storage until emptied.
Note the two or three biggest categories. Everything below is ordered by how often each one is the answer.
Cache versus data — read this before tapping anything
This is the single most important thing to understand, because the two buttons sit next to each other and do very different things.
Go to Settings → Apps → [any app] → Storage. You will see two figures and two buttons.
| Clear cache | Clear data | |
|---|---|---|
| What it removes | Temporary rebuildable files | Everything the app stores locally |
| Are you logged out? | No | Yes |
| Settings preserved? | Yes | No |
| Downloads preserved? | Yes | No |
| Safe to do freely? | Yes, always | Only as a last resort |
Clear cache is genuinely safe on any app, any time. Thumbnails, decoded images and prefetched content get deleted and the app rebuilds whatever it needs. The only cost is that the app may be slightly slower the first time you open it.
Clear data is equivalent to uninstalling and reinstalling. For a messaging app, that can mean losing local message history that is not backed up. Use it only when an app is genuinely broken.
One specific warning: on WhatsApp, Clear data (labelled Clear storage on some versions) logs you out and wipes local chats. WhatsApp’s own in-app storage manager is the safe way to delete media — covered in why WhatsApp takes so much storage, which is frequently the largest single win on an Android phone.
Use Files by Google
Google’s Files app is pre-installed on most Android phones and is the best cleanup tool available, largely because it finds things you would not think to look for.
Open it and go to the Clean tab. It surfaces:
- Junk files — app caches and temporary files, safe to remove.
- Duplicate files — usually photos saved twice by different apps.
- Large files — sorted by size, which is where forgotten videos surface.
- Downloaded files — the Downloads folder, which quietly accumulates PDFs and installers nobody needs.
- Backed-up photos — photos already safely in Google Photos, which it offers to remove from the device.
That last one is the biggest single item for most people, and it is safe provided your Google Photos backup is actually complete. Check in Google Photos that it says “Backup complete” before accepting.
Samsung phones have an equivalent under Battery and device care → Storage → Clean now, which is less thorough but perfectly usable.
Fix the apps that grow quietly
Four categories cause most of the problem.
Messaging apps saving everything
WhatsApp, Telegram and Signal all default to downloading media automatically, and in a busy group chat that is gigabytes a month. In WhatsApp, go to Settings → Storage and data, and set all three Media auto-download options to No media. Then turn off Media visibility under Settings → Chats so files stop being copied into your gallery as well.
Telegram is worth a specific look: Settings → Data and Storage → Storage Usage lets you set a cache size limit and clear the whole cache in one tap.
Offline media in streaming apps
This is the most commonly missed category, because the downloads are invisible until you look for them.
Check each of these individually — none of them appear as “Downloads” in your storage breakdown:
- Netflix → My Netflix → Downloads
- Spotify → Settings → Storage (also has a cache limit setting)
- YouTube / YouTube Music → Library → Downloads
- Audible, Podcasts, Kindle → each keeps downloaded content indefinitely
A handful of downloaded series or offline playlists is routinely 5–20GB.
Photos and video
If Google Photos backup is on, use the Free up space option in Google Photos (profile icon → Free up space on this device). It removes only local copies of photos that are confirmed backed up.
If backup is off, decide before deleting: either turn backup on and let it
complete, or copy the files to a computer. Connect by USB, set the connection to
File transfer, and copy the DCIM folder.
Video is where the size is. A minute of 4K footage is roughly 300–400MB, so a few long clips outweigh thousands of photos.
Games
Mobile games download asset packs after installation, so a 200MB install becomes several gigabytes. Check them in the storage list and uninstall anything you have not opened in months — most store progress against your account and will restore it on reinstall.
What to avoid
- Cleaner and booster apps from the Play Store. They clear caches you can clear in Settings, and Android already evicts cache automatically when space runs low. Most are advertising vehicles that request far more permission than the job needs, and a permanently running “optimiser” costs you battery.
- Clearing data when you meant cache. Worth repeating: it logs you out and deletes local content.
- Deleting folders under Android/data. These belong to specific apps and removing them can break the app in ways that are hard to diagnose.
- Factory resetting to free space. It works, and it is wildly out of proportion to the problem. Try everything else first.
- “RAM boosters”. Unrelated to storage, and closing background apps that Android was deliberately caching just makes them slower to reopen.
Realistic expectations
On a 128GB phone a couple of years into use, this sequence typically recovers 10–30GB. Removing backed-up photos and clearing WhatsApp media are usually more than half of it, with offline streaming downloads a close third.
Changing the settings is what makes it last. Deleting files without turning off auto-download buys a few weeks; turning off auto-download and setting cache limits means you do not repeat this.
If you also carry an iPhone or share a household with one, the same logic applies with different menus — see how to free up iPhone storage.