Short answer: for most people 256GB is enough for three to four years. Pick 512GB if you film a lot of 4K video, keep your whole photo library on the phone, or play big games. Pick 1TB or more only for ProRes video or ProRAW photography. To decide, check what you use today in Settings › General › iPhone Storage and roughly double it.
Steps
- Open Settings › General › iPhone Storage on your current phone and note the used number.
- Check how much of that is Photos. With iCloud Photos and Optimize iPhone Storage on, the phone keeps only small versions of the photos, so a new phone with the same setting needs much less.
- Add growth: most people's storage grows by 15–30 GB a year. Parents, travelers and people who film a lot grow faster.
- Keep 10–20% free. iOS needs room for updates, caches and new photos.
- Pick the tier that covers your number with that margin for as long as you plan to keep the phone.
Which size fits you
| You mostly... | Typical use after 3 years | Pick |
|---|---|---|
| Message, browse, stream, use iCloud Photos (optimized) | 60–120 GB | 128GB is tight, 256GB is comfortable |
| Take lots of photos, some 1080p video, keep originals | 120–220 GB | 256GB |
| Film 4K often, download shows, play big games | 200–400 GB | 512GB |
| Shoot ProRAW photos or ProRes video | 400 GB+ | 1TB or 2TB |
Since the iPhone 17 lineup (2025), new iPhones start at 256GB, and the largest Pro models go up to 2TB. Older and refurbished models still come with 64GB or 128GB, and that's where most "storage full" problems start.
How fast things fill up
| Item | Roughly |
|---|---|
| 1,000 photos (HEIC) | 2–5 GB, depending on the model |
| 1 minute of video, 1080p 30 fps | 60 MB |
| 1 minute of video, 4K 30 fps | 170 MB |
| 1 minute of video, 4K 60 fps | 400 MB |
| A big game | 2–15 GB |
| iOS plus System Data | often 15–25 GB |
Video is what fills phones. Ten minutes a week of 4K at 60 fps is about 200 GB a year. More in how much storage 4K video takes.
Does iCloud mean I can buy less storage?
Partly. With iCloud Photos and Optimize iPhone Storage on, your full-size photos and videos live in iCloud and the phone keeps smaller versions, so the library itself takes much less space. You'll need a paid iCloud+ plan once your library passes the free 5 GB (plans explained), and apps, games, Messages and downloads still need room on the phone.
If your current iPhone is already full
You don't have to upgrade to get space back. Most full iPhones are full of duplicates, near-identical retakes, old screenshots and long videos. Spaceclear finds all of them in one scan and can compress the videos you keep. See how to free up storage on iPhone for the full checklist.
FAQ
Is 128GB enough for an iPhone in 2026?
For light use with iCloud Photos optimized, yes. If you keep photos and videos on the phone or film in 4K, 128GB fills up within a year or two, and you'll spend time managing storage.
Should I get 256GB or 512GB?
256GB if most of your photos live in iCloud and you rarely film 4K. 512GB if you shoot a lot of video, travel without good internet, or keep the phone four years or more. The price difference is usually less than a few years of a bigger iCloud plan.
Can I add more storage to an iPhone later?
No. iPhone storage can't be upgraded. You can add iCloud storage, or use a USB-C drive with the Files app for files and exported videos, but apps and the Photos library stay on the internal storage.
Updated 2026-11-13