Cloud Storage

Cloud storage does two jobs that often get sold as one: making your files available everywhere, and keeping them safe. It is very good at the first. Whether it does the second depends entirely on details most comparison charts skip.

Sync, backup, and the mistake in between

Sync keeps a set of files identical across your devices and the provider's servers. Change a file on your laptop and the change appears on your phone. That immediacy is the value — and the risk. Delete a folder, and it deletes everywhere. Let ransomware encrypt your documents, and the encrypted versions sync up faithfully within seconds.

Backup keeps historical copies so you can return to a point before something went wrong. It is designed around recovery, and it does not propagate your mistakes.

Most people who believe their files are backed up actually have them synced. The practical consequence: version history and a deleted-files retention window are the most important features in this category, because they are what let sync behave a little like backup. Check how far back versions go and how long deleted files are kept — this varies from a couple of weeks on free tiers to a year or more on paid plans, and it is the specification that decides whether a bad day becomes a disaster.

For anything irreplaceable, keep the old rule: three copies, on two kinds of media, one of them somewhere else.

What separates the options

Where your files physically live and who can read them. Standard services encrypt files in transit and at rest, but hold the keys — necessary for browser previews, search and password resets, and it means the provider can technically access your content. End-to-end encrypted services cannot. Jurisdiction matters too if you have specific legal or regulatory concerns.

How sync handles the awkward cases. Large files, files open in an application, conflicting edits from two devices, and files-on-demand placeholders that free up local disk. This is where services differ most in daily use and where reviews are least helpful — the only real test is a fortnight with your own files.

Sharing. Link expiry, passwords, download limits, view-only access and whether the recipient needs an account. If you send work to clients, this is a core feature rather than an extra.

What it is bundled with. For many people the cheapest storage is the storage already included with an office suite, a phone ecosystem or a privacy suite they pay for. Before buying storage separately, check what you already own — it is frequently better value than any standalone plan.

Photo handling. If photos are the bulk of your data, treat photo management as the primary requirement: automatic phone upload, deduplication, whether original resolution is preserved, and how easily you can get the whole library out again.

Reading storage pricing honestly

Storage is sold in tiers, and the useful comparison is cost per gigabyte at the tier you would actually buy, not the headline price of the smallest plan.

Things that distort a straight comparison:

• Family plans that split a large pool between several people, changing per-person cost dramatically.
• Bundles where storage arrives with software you would have bought anyway.
• Free tiers ranging from a token amount to something genuinely usable — and occasionally reduced later.
• Egress or transfer limits on cheaper providers, which matter if you regularly download large amounts.
• Annual billing discounts, usually the only way to reach the advertised price.

When end-to-end encryption is worth the trade

It is a real trade, not a free upgrade. You gain protection against the provider itself. You give up in-browser editing, most content search, some previews and easy account recovery. Lose your key and the data is gone — that is the guarantee working as designed.

It is worth it for confidential client work, legal and medical records, journalism, and anyone with a specific reason not to trust a provider with readable copies. For a family photo library, the convenience of a mainstream service usually wins.

A middle path works well: a mainstream service for everyday files, and an encrypted container or separate encrypted service for the small set of genuinely sensitive documents.

Before you commit

1. Measure what you actually store today, and what it grows by in a year.
2. Check what storage you already have inside subscriptions you pay for.
3. Decide whether you need storage, backup, or both — and if both, plan for both.
4. Look up version history and deleted-file retention on the specific plan.
5. Test sync with your real files for two weeks before moving everything.
6. Confirm how you would get everything out, and how long that would take.

That last point is the one people discover too late. Downloading several hundred gigabytes is a slow process on a domestic connection, and some services make bulk export considerably easier than others.

Working out what to buy

These start from a situation rather than a product. Prices come from each provider's own pages with the date they were checked, and where a provider did not display a figure we say so rather than estimating one.

• The best free cloud storage — allowances run from 2GB to 15GB, and the largest one is shared with your email.
• The best cloud storage for a small business — you are buying revocation and recovery, not capacity.
• The best cloud storage for photos — the one library you cannot recreate, and the deletion trap that catches people.
• What cloud storage actually costs — the per-terabyte arithmetic nobody publishes.

Choosing between two services

• Google Drive vs Dropbox — one is built to create documents, the other to keep files.
• Dropbox vs OneDrive — on value this is not close, so the question is what Dropbox's premium buys.
• Dropbox alternatives — four reasons to leave, four different destinations.

Before you buy anything

• Cloud storage vs backup — sync copies your mistakes as faithfully as your files, which is why storage is not safekeeping.
• How much cloud storage do I need? — measure rather than estimate; most people pay for several times what they use.
• Is cloud storage safe? — two different questions, and the more likely risk gets the least attention.

When something is already wrong

Most cloud storage problems turn out to be a documented limit behaving as designed rather than a fault, which is why restarting things rarely helps. Each of these works through the causes with a check that tells you which one is yours:

• Storage still full after you deleted everything — trash still counts, and shared files were never yours.
• Your cloud folder is filling the C: drive — one setting fixes it, and the same setting is how people end up with empty backups.
• Google Photos is eating your Drive storage — the compressed backup setting is no longer free.
• Recovering deleted files — 30 days, 93 days or 180, depending on which account you are on.
• Every documented limit in one place — the reference table behind all of the above.

If you stop paying

Every service answers this somewhere, none of them agree, and the spread runs from two years to six months to nothing published at all.

• The deadlines compared — four services, four completely different answers.
• Google One — two years, and your shared documents go read-only for everyone long before that.
• OneDrive frozen — three months to a freeze, six to possible deletion, and your email stops first.
• Dropbox — the only one that documents deleting your files, oldest first.
• Microsoft 365 expiry — Reduced Functionality Mode and the 5 GB cliff.
• Cancelling iCloud+ — and what Apple does not say.
• Google's other two-year clock — the one about not signing in.

Where to go next

See our buying guides for the decision framework, and comparisons for specific services side by side. If your main worry is losing files rather than reaching them from anywhere, read the sync-versus-backup section above again before you buy anything.