How to Check iPhone iCloud Backup Size Before It Runs Out
Many Aussies don't think about iCloud storage until their iPhone flashes the dreaded "Not Enough Storage" warning, usually right when they're trying to download a new app or back up before a trip to Bali. The thing is, your backup can creep up on you quietly, especially if you've got years of photos, WhatsApp chats with the family group, and half a dozen fitness apps syncing away in the background. Knowing how to check your iPhone's iCloud backup size before it tips over the edge is one of those small skills that saves a heap of stress.
The good news is Apple has built the tools right into iOS, and they're only a few taps away. Whether you're on Telstra, Optus, or Vodafone AU, using a brand-new iPhone 16 Pro, or still hanging on to an iPhone 11, the process is essentially identical. You can also check from a Mac, a Windows PC, or any browser at iCloud.com if you'd rather look at a bigger screen. We'll walk through all of it, plus a few practical tips to keep things tidy.
What Really Counts Toward Your iCloud Backup
Before you start tapping around in Settings, it helps to know what Apple actually saves when it makes a backup, because not everything on your phone ends up in the cloud. A standard iCloud backup grabs your photos and videos (unless you've enabled iCloud Photos), Messages and attachments, app data for most third-party apps, your device settings, Home screen layout, ringtones, Apple Watch backups, and Visual Voicemail if your carrier supports it. Health and Keychain data go in too, encrypted end-to-end, which is genuinely handy.
What doesn't count? Anything you've already stored in iCloud through syncing rather than full-device backup. So your iCloud Photos library, iCloud Drive files, Mail, Contacts, Calendars, Notes, and Reminders don't add to your iCloud backup size in the same way, because they're syncing live rather than being snapped with each backup. Music, movies, and TV shows you downloaded from Apple TV or iTunes don't get backed up either, since Apple can re-download them from its servers. Same goes for apps, which get pulled back from the App Store when you restore onto a new device.
This matters in Australia because of how we actually use our phones. MMS group chats with mates during the cricket, RCS messages through Telstra or Vodafone, and those long Threads threads with family in Melbourne can quietly fatten up your backup. Add in a few voice memos recorded during a road trip up the NSW coast, and suddenly your 5GB free tier is toast.
How Much Storage Australians Typically Use
Apple gives every Apple ID 5GB of free iCloud storage, which, let's be honest, isn't much these days. Most folks in Australia pay for an iCloud+ plan, and the tiers have stayed steady since Apple's last pricing refresh. Here's how they stack up at the time of writing, with prices listed in Australian dollars and GST included.
| Plan | Storage | Price (AUD/month) | Best For |
|---|---|---|---|
| Free | 5GB | $0 | Bare-bones only, no photo sync |
| iCloud+ 50GB | 50GB | $1.39 | Light users, mostly contacts and notes |
| iCloud+ 200GB | 200GB | $3.49 | Most households, shared with family |
| iCloud+ 2TB | 2TB | $10.99 | Photographers and creators |
| iCloud+ 6TB | 6TB | $32.99 | Multi-device households |
| iCloud+ 12TB | 12TB | $54.99 | Power users and small studios |
The 200GB plan hits the sweet spot for most people in Australia. It's enough to back up a couple of iPhones and an iPad, share the pool with up to five family members through Family Sharing, and still leave room for iCloud Photos. Prices shown are direct from Apple and exclude any bundled offers Telstra or Optus sometimes throw in for postpaid customers as part of a retention deal.
If you're sharing with the family, remember that everyone draws from the same pool of storage, so make sure the total across everyone's backups actually adds up. It's a common gotcha when the kids each get a new iPhone and suddenly realise their backups don't all fit under one plan.
Step-by-Step: Checking Your iCloud Backup Size on iPhone
Checking your iPhone's iCloud backup size only takes about thirty seconds. Grabbing a flat white while it loads is optional. Here's the path through iOS 18 (and earlier versions follow the same trail, give or take a renamed menu).
Open the Settings app and tap your name at the very top of the screen. You'll land on your Apple ID card. Tap iCloud, then tap Storage, or on older builds, Manage Account Storage. After a brief moment, the phone will calculate how much you're using and break it down by category. You'll see a coloured bar graph at the top with the categories listed underneath. Scroll down to the section labelled Backups, and you'll find each device that's currently using iCloud, plus the size of its last backup and the timestamp.
Tap on your iPhone's entry to dig deeper. You'll see "Next Backup Size," which is what your next automatic backup will probably weigh if nothing major changes, and the breakdown of what's inside it. The largest line item for most Australians is "Backups," which is essentially your app data and settings rolled into one, followed by Photos and Mail.
If the graph is mostly red or grey rather than blue and orange, you're running close to the line. The phone doesn't send you a polite text message when storage gets tight; it just refuses to back up, often at the worst possible time, like when you're swapping phones before heading off on a trip up to Cairns.
Reading the Breakdown Screen and Spotting the Biggest Hogs
The breakdown screen is where you actually do something about the problem. Apple lists every category in approximate order of size, so the top of the list is usually where the bulk of your storage lives. For most people in Australia, that means one of three suspects.
iCloud Photos, if enabled, eats the most storage by a country mile. A single weekend down at Byron Bay, snapped on the new iPhone 16 Pro Max in ProRAW, can eat several gigabytes in one go. If you've got "Download and Keep Originals" switched on, those files live in iCloud as well as on your phone, which is what people often miss when they're trying to claw back space.
Next biggest is usually Messages, particularly if you're part of a busy WhatsApp or Telegram group chat. Apple's breakdown gives you a separate "Manage Messages" option, where you can choose to keep messages for 30 days, one year, or forever, rather than the default of forever. Old attachments pile up silently and rarely get pruned by themselves.
Rounding out the top three for Australians is often Mail, because we tend to keep multiple accounts hooked up. Gmail, Outlook, an old work address, and that university alumni email from UQ or UNSW can pile up gigabytes of attachments, especially old PDFs from the ATO. Apple only counts what syncs locally, but that's usually still enough to push your backup into the danger zone.
There's also a "Show All" option at the bottom of the graph that reveals apps you might not have considered, like third-party podcast apps, Safari offline reading lists, and downloaded maps. Tapping into one of these lets you toggle off the backup entirely, which can claw back hundreds of megabytes at a time without losing anything you actually need.
Checking iCloud Storage From a Mac or Windows PC
Sometimes it's easier to look at storage on a larger screen, especially if you're the family tech support person trying to fix things over the phone. Apple has two routes here: a dedicated macOS app and a web interface at iCloud.com that works in any browser.
On a Mac running macOS Sequoia or later, open System Settings, click your name, then iCloud, then Storage. macOS shows the same coloured graph as iOS, with a slightly more spacious layout that makes it easier to spot what's eating the most room. From here you can right-click a device to delete its old backup, which is genuinely useful if you've got two or three old iPhones sitting in your account from previous upgrades.
On Windows, install the iCloud app from the Microsoft Store, sign in with your Apple ID, and click Storage. You'll see the same information, although the layout is older and a touch clunkier than the macOS version. The web route through iCloud.com also works and doesn't require any software install, which is handy if you're using a library PC in Brisbane or your folks' old laptop in Adelaide.
Whichever way you go, the key piece of information is the same: the size of each device's last backup, plus the total storage you've used and how much is left in your tier. If you've got multiple devices on the same Apple ID, this is the fastest way to see which one is hogging the lion's share of the family quota.
Quick Ways to Free Up iCloud Storage Before It Overflows
Once you've spotted the problem, fixing it is fairly painless. The fastest wins, in roughly the order of impact, are these.
Switch off backups for apps that don't actually need one. Apple's breakdown screen lets you deselect individual apps, but doing it for navigation, music, and one-time-use utilities can reclaim a few hundred megabytes without losing anything important. Delete old device backups you no longer use. If you've upgraded from an iPhone 12 to a 16 and still have both backups hanging around, get rid of the old one. It's no use to you now and just sits there taking up space.
Turn on "Optimise iPhone Storage" for Photos if you haven't already. This keeps thumbnails on the phone and pushes full-resolution originals to iCloud, which dramatically reduces the size of your local copy and lets your backup focus on the smaller files. Just make sure you've got a decent NBN connection, or you're happy to keep the originals in the cloud long-term.
Trim your Messages retention down to 30 days or one year. Most of those old photos from the kids' birthday a few years back are safely backed up elsewhere anyway, or, no offence, no longer worth a second look. Finally, go through the Photos app once a week and have a decent purge. The worst photo hoarders are the ones who never bother, and a ten-minute tidy on a Sunday arvo can save you gigabytes before you know it.
If you're still tipping over your storage limit after all that, it's probably time to bump up your iCloud+ tier. The 200GB plan at $3.49 a month is the cheapest practical upgrade for most Aussie households, and you can share it with the family through Family Sharing. Just do it before your phone locks you out of the next automatic backup, because losing the chance to back up even once is a real headache when something goes wrong with the device.
There's a quiet kind of relief in knowing exactly where your iCloud storage sits, instead of guessing. Set a reminder in your calendar for the first of each month, or just check whenever you go into Settings anyway. The few seconds it takes can save you from a much bigger arvo of troubleshooting later, and that's something every household can get behind.