How Much Cloud Storage Do You Actually Need?
Almost everyone buys more than they need, because the tiers are designed to make 2TB feel prudent. Here is how to work out the real number in five minutes.
On this page
- Step one: measure, do not estimate
- Step two: understand what actually consumes space
- Step three: match to a tier
- What people get wrong in both directions
- Overbuying: paying for headroom you will never use
- Underbuying: living inside a tier that does not work
- Before you buy anything: two ways to need less
- The thing storage size does not solve
The honest answer for most people is less than you are about to buy, and the reason you are about to overbuy is that the tiers are designed to make it feel prudent.
Storage plans jump in large steps — 200GB, then 2TB, with very little in between. Faced with "you are at 180GB", the 2TB plan looks like the responsible choice, and you have just bought ten times what you need.
Here is how to work out the real number.
Step one: measure, do not estimate
This takes about two minutes and it is the only step that matters.
- iPhone: Settings → General → iPhone Storage. Photos will be the largest line.
- Android: Settings → Storage.
- Mac: Apple menu → System Settings → General → Storage.
- Windows: Settings → System → Storage.
- Your current cloud service shows usage in its own settings, usually broken down by type.
Write down the photo figure and the documents figure separately. Almost everyone is significantly below what they assumed, and the surprise is usually that documents are irrelevant.
Step two: understand what actually consumes space
| Type | Typical size | 1,000 of them |
|---|---|---|
| Word document | ~50KB | ~50MB |
| ~500KB–2MB | ~0.5–2GB | |
| Phone photo | ~3–5MB | ~3–5GB |
| Raw photo (camera) | ~25–50MB | ~25–50GB |
| 4K video | ~350MB per minute | Impractical to count this way |
Three conclusions fall straight out of that table.
Documents are effectively free. Ten thousand Word files is around 500MB. A lifetime of contracts, letters, spreadsheets and notes fits inside a free tier with room to spare. If your work is documents, you are not the customer these plans were designed for.
Photos are the main consumer for households. At 3–5MB each, a serious family library of 50,000 photographs is 150–250GB. That is real, but it is a 200GB plan, not a 2TB one.
Video is the only thing that fills a plan. A few minutes of 4K can exceed a gigabyte. One person filming school plays and holidays will consume more storage than a colleague's entire twenty-year document archive. If you record video regularly, everything above stops applying and you should size for 2TB and up.
Step three: match to a tier
| If you are | You need | Which is |
|---|---|---|
| Documents only | Under 15GB | A free Google account |
| One person, moderate photos | 50–100GB | iCloud+ 50GB at $0.99/mo |
| Household photo library | 200GB | iCloud+ 200GB at $2.99/mo, shareable with 5 others |
| Family with several devices | Up to 6TB | Microsoft 365 Family, $129.99/yr, 1TB each for up to 6 people |
| Video, raw photography, archives | 2TB+ | iCloud+ 2TB or Dropbox Plus, both $9.99/mo |
Prices from each provider's own pages, checked 31 August 2026.
The line worth noticing is the fourth. Microsoft 365 Family at $129.99 a year gives up to 6TB across six people — 1TB each — with the Office apps included. Per person per terabyte, nothing else here comes close, and a household buying individual 2TB plans is usually spending several times more for less.
What people get wrong in both directions
Overbuying: paying for headroom you will never use
The commonest error. Someone at 40GB buys 2TB because it is the tier above 200GB and it feels like future-proofing.
At $9.99 a month against $2.99, that is $84 a year for storage that will sit empty. Over five years, $420 to avoid an upgrade that takes thirty seconds and can be done at any point.
Buy the tier you need now. Upgrading is instant, uninterrupted and available the moment you actually need it.
Underbuying: living inside a tier that does not work
The opposite error, and it costs more than money. Someone stays on Apple's free 5GB, which will not hold one modern phone backup, and consequently has no phone backup at all.
Fifty gigabytes is $0.99 a month. Spending twelve dollars a year rather than losing your photographs is not a close call, and "I am trying to manage without paying" is the position that produces the actual disasters in this category.
Before you buy anything: two ways to need less
Clear your email. If you are being asked to pay Google, the 15GB is shared across Drive, Gmail and Photos, and in most established accounts the space has gone to years of email attachments rather than files. Sorting Gmail by size and deleting the largest few dozen attachments routinely recovers several gigabytes in ten minutes.
Check for duplicated backups. Plenty of people are backing up the same photo library to two services without realising, because one was set up years ago and forgotten. Turning one off can halve your usage instantly.
The thing storage size does not solve
Buying a bigger plan does not make your files safe, because sync services propagate deletion — remove a file on your laptop and it goes from the cloud too.
If the reason you are sizing a plan is that you are worried about losing things, storage is the wrong purchase and you want a backup instead. That distinction, and what it costs, is in cloud storage vs backup.
Once you know your number, the price comparison across every provider is in what cloud storage actually costs, and if the answer turns out to be "nothing", the free allowances are compared in the best free cloud storage.
One thing worth checking before you commit to a plan: the caps that are not about capacity at all. Daily upload ceilings, file size maximums and bulk download limits decide whether you can actually move your data in and out, and they differ sharply between providers. They are collected in every cloud storage limit in one place.
Questions people ask
How much cloud storage do I need?
For documents only, 15GB free is usually plenty. For a typical household photo library, 200GB - which is $2.99 a month on iCloud+. Only shoot video regularly, hold a design or photography archive, or share storage across a whole family before you need 2TB.
Is 100GB of cloud storage enough?
For one person with documents and a moderate photo library, usually yes. It holds roughly 20,000 to 30,000 phone photos alongside years of documents. It becomes tight if you record video, or if the plan is shared with several people.
Is 2TB of cloud storage overkill?
For most individuals, yes. 2TB suits heavy video, professional photography, several people sharing one allowance, or a full computer backup. If you are buying it because it feels safer, check your current usage first - people are routinely at 10 to 20 percent of what they pay for.
How much space do photos take?
Modern phone photos average roughly 3-5MB each, so 10,000 photos is around 30-50GB and 50,000 is 150-250GB. Video changes the picture entirely - a few minutes of 4K can exceed 1GB, so a handful of holiday videos can outweigh thousands of stills.
How do I check how much storage I am using?
On an iPhone, Settings then General then iPhone Storage shows what photos and apps consume. On Android, Settings then Storage. On a computer, your storage settings show usage by category. Each service also shows your current cloud usage in its own settings - start there rather than estimating.
Where this information comes from
Product details change often. Each item below links to the primary source we checked, so you can confirm anything that matters to your decision.
Spotted something out of date or incorrect? Tell us and we will fix it.