“Storage almost full” always arrives at the worst moment — usually when you’re trying to photograph something that won’t wait. And the instinctive response, scrolling through your photo library deleting one picture at a time, is close to the least effective thing you can do.

The reason is that the space isn’t usually where you think it is. On a typical full phone, three things are holding tens of gigabytes each, and all three are invisible unless you go looking.

What is actually filling a full phone

Step 1 Look at the breakdown before you delete anything Open Settings and find the storage screen. It lists exactly what is using space, largest first. Almost nobody looks at this, and it usually shows the problem is not what you assumed.

Each block is a category from your phone's own storage screen. The red block is the deleted-photos album — still fully occupying space.

Look at the breakdown first

This is the step that changes what you do next.

  • iPhone: Settings → General → iPhone Storage
  • Android: Settings → Storage (or Settings → Device care → Storage)

Wait a few seconds for it to calculate. You get a bar broken into categories and a list of apps ordered by size. Read it before touching anything — the answer is almost always different from the assumption. People convinced their photos are the problem routinely find a single game, or a podcast app, sitting at the top.

The three big wins

1. Recently Deleted (usually the biggest single tap)

When you delete a photo, it goes into a recovery album for around 30 days. It is not gone, and it is not smaller. If you’ve been diligently deleting photos for a month, all of them are still on your phone.

  • iPhone: Photos → Albums → Recently Deleted → Select → Delete All
  • Android (Google Photos): Library → Bin → Empty bin

On a phone that has never had this done, this step alone commonly frees more space than everything else combined.

2. Offload apps you don’t open

Your storage screen shows apps by size and, on iPhone, the date you last used each one. Look for the combination of large and last used two years ago.

Offloading is the key idea: it removes the app’s program files but keeps all your documents and settings. The icon stays on the home screen, greyed out. Tap it and it reinstalls, exactly as you left it.

  • iPhone: tap the app in iPhone Storage → Offload App. Or turn on Offload Unused Apps at the top of that screen and the phone does it automatically when space runs short.
  • Android: tap the app → Uninstall, and use “Archive” where offered, which does the same thing as offloading.

Games are the classic offender. One large game can exceed an entire photo library.

3. Clear offline downloads

Every streaming app hoards. Check each one individually — none of them will volunteer this:

  • Netflix / Disney+ / Prime Video: Downloads section
  • Spotify / Apple Music: downloaded albums and playlists
  • YouTube: Downloads
  • Podcast apps: the worst offenders, because most auto-download every new episode and keep them all. Set a limit of two or three episodes and delete played ones automatically.

If you’re on unlimited data at home, downloads buy you very little and cost you a great deal of storage.

Photos, without deleting photos

If your library genuinely is the biggest category, you don’t have to choose between space and memories.

Turn on optimised storage. The phone keeps a small version on the device and the full-resolution original in the cloud, fetching it when you open it.

  • iPhone: Settings → Photos → Optimise iPhone Storage
  • Android: Google Photos → Settings → Back up → Manage device storage → Free up space

Then find the duplicates. Both platforms now detect them for you — iPhone under Photos → Utilities → Duplicates, Google Photos under the Free up space screen. Burst shots and screenshots are usually where the volume is.

What you can’t clear

The System or Other category — the operating system plus caches and logs — has no supported way to be cleared directly, and cleaner apps that claim otherwise are generally not telling the truth. Restarting the phone clears some temporary files. Beyond that, only a full backup and restore resets it, which is a large job for an uncertain gain.

Treat it as a fixed cost. Your usable space is the total minus that.

Make it not happen again

Three settings, and the phone maintains itself:

  1. Optimised photo storage on. Your library stops being the constraint.
  2. Offload unused apps on. The phone reclaims space from things you’ve abandoned, without asking.
  3. A podcast download limit. Keep three episodes, delete after playing.

Then a two-minute look at the storage screen every few months, before it becomes urgent — which is the whole trick with most of these problems.

The steps, in writing

Same sequence as the animation — handy if you'd rather read it, or print it and take it with you.

  1. Look at the breakdown before you delete anything Open Settings and find the storage screen. It lists exactly what is using space, largest first. Almost nobody looks at this, and it usually shows the problem is not what you assumed.
  2. Empty Recently Deleted Photos you delete sit in a recovery album for around 30 days and still occupy full space. Emptying it is the single fastest win on most phones, and often frees tens of gigabytes in one tap.
  3. Offload the apps you never open Offloading removes the app but keeps its documents and settings, so reinstalling puts you back exactly where you were. Games and social apps are the usual offenders — a single game can hold more than your entire photo library.
  4. Clear downloaded video, music and podcasts Netflix, Spotify, YouTube and podcast apps quietly cache offline content. Check each one for a downloads or offline section and clear what you have already watched.
  5. Confirm the result, then set it up to not happen again Go back to the storage screen and check the number moved. Then turn on optimised photo storage or automatic offloading so the phone maintains itself.

Questions people actually ask

Does "offload" delete my data?

No. Offloading removes the app itself but keeps its documents and data on the phone. Tapping the greyed-out icon redownloads it and everything is where you left it. Deleting an app removes both. If you are unsure, offload rather than delete.

Will optimised photo storage delete my originals?

Not if the backup has completed. It keeps a smaller version on the device and the full-resolution original in the cloud, downloading it on demand when you open or share the photo. Before turning it on, confirm the backup is finished — the photo app usually shows a progress line at the bottom of the library.

What is "System" or "Other" and why is it so big?

It is the operating system plus caches, logs and temporary files that do not belong to a single app. It grows and shrinks on its own and there is no supported way to clear it directly. Restarting the phone clears some of it. If it is enormous and stays that way, backing up and restoring the phone genuinely does reset it, but that is a last resort.

Why does my phone still say full right after I deleted things?

The storage figure updates lazily, and on iPhones deleted photos move to Recently Deleted rather than disappearing. Empty that album, then restart the phone and check again. A gap of a few minutes between deleting and the number moving is normal.

Do I need a cleaner app?

No. On both iOS and Android the built-in storage tools show more accurate information than third-party cleaners, which frequently cannot access the files that actually matter and sometimes bundle aggressive advertising. Everything in this guide uses tools already on the phone.

Published 3 August 2026

Howloop guides are general advice for common problems. If something about your situation looks different from the animation — a smell of gas, water near electrics, an injury — stop and get a professional.