Choose storage from evidence on your current phone, not from fear of running out and not from the retailer's price ladder. For many buyers, 128 GB is a sensible starting point, while 256 GB is more comfortable for frequent video, large games and substantial offline media. Some light users can manage with 64 GB; 512 GB and 1 TB are specialist choices rather than automatic upgrades.
These are practical guidelines, not universal rules. The operating system, pre-installed software and the way manufacturers describe capacity mean the full advertised figure will not be available for your own files.
Check your present usage first
- Open the storage page in your phone's settings.
- Record the total capacity and the amount currently used.
- Check the categories for photographs, video, apps, games, downloads and system data.
- Remove obvious temporary files and confirm which photographs or documents are safely backed up.
- Estimate how much your usage has grown during the time you have owned the phone.
A snapshot after at least a year of normal use is more useful than a general label such as “light” or “heavy” user. Two people who mainly use messaging can have completely different storage needs if one receives large work files and the other does not.
Which capacity fits which type of use?
| Capacity | Likely fit | Main risk |
|---|---|---|
| 64 GB | Light use, limited apps, streaming rather than downloads, regular file management | Little headroom for large updates, video and modern games |
| 128 GB | Mainstream use, regular photos, ordinary apps, some offline media | Can become tight for frequent high-resolution video or several large games |
| 256 GB | Frequent photography and video, larger games, offline maps, music or films, longer ownership | Paying for unused space if most data is streamed or archived promptly |
| 512 GB or 1 TB | Professional or sustained video work, very large local libraries, specialist offline use | Large upfront premium that may not be recovered at resale |
Do not assume a lower-cost phone can use an SD card. Expandable storage is model-specific, and an SD card may not be suitable for every application or for recording at the highest video settings.
What fills a phone fastest?
Video is usually the largest variable. Resolution, frame rate, compression and recording format can change file size dramatically. Check the manufacturer's camera settings and record a short sample in the mode you intend to use, then inspect the file size rather than relying on a universal minutes-per-gigabyte estimate.
Games and offline media can also be substantial. Some applications download additional files after installation, while streaming apps can store films, music or podcasts for offline use. Messaging apps may retain years of photographs, voice notes and video unless their storage settings are managed.
System and cached data can grow, but not every “cleaner” app is useful or trustworthy. Use the phone's own storage tools first. Deleting an app's data can remove logins, downloads or locally stored information, so understand what the control does before using it.
Cloud storage is not the same as phone storage
Cloud services can back up photographs and make files available across devices, but they do not turn a 64 GB phone into a 256 GB phone. Applications, system updates, offline media and many working files still need local capacity.
Compare the options over the same ownership period:
Illustrative example: if the next storage tier costs £100 more and a cloud plan costs £2.99 per month, the subscription totals £143.52 over four years. The comparison is not simply £100 versus £2.99: the storage upgrade is local and permanent for that phone, while the subscription provides an ongoing service that can include backup and access from other devices.
Cloud access also depends on connectivity and account access. Keep a separate backup of irreplaceable files rather than treating one synchronised library as the only copy.
Does extra storage improve resale value?
A higher-capacity version may attract more buyers and sell for more than the base model, but it should not be assumed to recover the full original upgrade premium. Demand depends on the model, age, condition and the price gap in the used market when you sell.
Choose extra storage primarily because you expect to use it. Treat any higher resale value as a secondary benefit. The largest capacities can be harder to justify because relatively few second-hand buyers need them enough to pay a large premium.
A practical rule for choosing
- If your current phone is below roughly three-quarters full after sustained normal use, the same capacity may still be adequate.
- If you regularly remove files or apps to install updates, move up at least one tier.
- If you plan to keep the next phone much longer, allow headroom for larger apps, updates and a growing media library.
- If you record substantial video or keep large games and offline media, test your real file sizes and choose from those figures.
- If the price jump is large, compare a better-capacity previous-generation phone with the base version of the newest model.
Storage should remove friction, not become an expensive form of reassurance. Buy enough for your measured use and reasonable growth, then spend the remaining budget on the features that affect you every day.
If the right capacity pushes the newest model beyond your limit, compare a higher-storage previous-generation phone rather than dropping to a capacity you already know will be restrictive. Use the complete phone buying guide to compare the rest of the purchase.
Sources checked
Information checked on 25 July 2026. Menu names vary by model and software version.
