Almost everyone intends to back up their files. Far fewer actually do, and a good number of those who think they do are relying on something that would not survive the most likely disaster. The gap is rarely laziness. It is usually confusion about what the options really protect against.
Cloud storage and external drives both get called “backup”, but they fail in completely different ways. Understanding those differences is what turns good intentions into files you can actually recover.
First, a Distinction That Matters
Sync is not backup. This trips up more people than any other point, so it is worth being precise.
A sync service keeps a folder on your computer identical to a copy in the cloud. That is genuinely useful, and it does protect you if your laptop is stolen or its drive dies. But it works in both directions. Delete a file by mistake and the deletion syncs. Corrupt a document and the corruption syncs. Encrypt your files with ransomware and the encrypted versions sync.
A backup keeps historical versions that you can return to. If today’s copy is wrong, you can retrieve last Tuesday’s. Most sync services do keep some version history, which softens this considerably, but usually for a limited window and often awkwardly. Treat it as a safety net rather than a backup system.
What Each Option Is Good At
External drives
An external drive gives you speed and control. A full backup of a large photo library takes hours over a USB connection and potentially days over a home internet connection. Restoring is equally fast, which matters enormously on the day you actually need it. You pay once, you own the hardware, and nobody can change the terms.
The weakness is that the drive sits in the same room as the computer. Fire, flooding, theft, or a household accident takes both. Drives also fail without warning, and an external drive that lives permanently plugged in is exposed to the same power surges and the same ransomware as the machine it is attached to.
Cloud backup
Cloud backup solves the location problem completely. Your data is somewhere else, professionally maintained, on hardware you never have to think about. It runs automatically, which is the single most important feature any backup can have, because a backup that depends on you remembering is a backup that stops happening.
The weaknesses are bandwidth, cost over time, and dependence. The initial upload can take a very long time. You pay every month for as long as you want the protection. And restoring a large amount of data over the internet is slow, sometimes painfully so.
The Answer Is Both, and It Is Not Expensive
The long-standing rule of thumb among people who do this professionally is three copies of anything you care about, on two different kinds of storage, with one copy somewhere else. It sounds elaborate. In practice it looks like this:
- The working copy on your computer.
- An automatic local backup to an external drive, which gives you fast restores and version history.
- An automatic cloud backup, which survives anything that happens to your home.
Both operating systems include the local half at no cost. Windows has File History, macOS has Time Machine. Plug in a drive, switch it on, and it runs quietly from then on. That takes about five minutes to set up and covers the most common failure by far, which is a dead internal drive or a file you deleted and wanted back.
The cloud half is the part worth paying for, and even modest plans cover the documents and photos that actually matter.
Choosing an External Drive
You do not need anything exotic. A few things genuinely matter:
- Capacity of at least twice what you are backing up, so version history has somewhere to live.
- SSD or mechanical is a real choice. Mechanical drives give you far more space per unit of money, which suits a backup that sits on a desk. SSDs are faster and survive being knocked about, which suits a drive you carry.
- A drive dedicated to backup. Do not use your backup drive as overflow storage for files that exist nowhere else. That is not a backup, it is a single copy in an inconvenient place.
- Replacement, eventually. Drives do not last forever. If yours is several years old and holds your only local backup, plan to replace it rather than waiting to find out.
Choosing a Cloud Service
Look at what happens on the worst day, not at the feature list.
- Version history length. How far back can you go? Ransomware is sometimes discovered weeks after it arrived, and a seven-day window may not be enough.
- Deleted file retention. How long after deletion can you recover something? Indefinite is best; thirty days is common.
- How restores work. Can you retrieve one file easily, or does everything come as one enormous archive? Some services will post you a physical drive for large restores, which is worth knowing about before you need it.
- What is actually covered. Some services back up your whole machine; others only sync chosen folders. Make sure the things you care about are inside whatever it watches.
- Encryption. Encryption in transit and at rest should be standard. Some services also offer keys only you hold, which is more private but means a lost key means lost data.
Setting It Up So It Keeps Working
Automate everything. Any step that requires you to remember will eventually be skipped, and you will not notice until it matters.
Then, once, actually test a restore. Pick a file, delete it, and get it back from each copy. This takes ten minutes and it is the only way to know your backup works. A surprising number of people discover their backup was silently broken for months at the exact moment they needed it.
Set a reminder to repeat that test every few months, and to glance at whether the backup is still running. Services get disconnected, drives get unplugged and not plugged back in, and subscriptions lapse.
If You Only Do One Thing
Plug in an external drive and switch on the backup feature your computer already has. It costs the price of a drive, takes five minutes, and protects against the failures that are most likely to happen to you.
Add cloud backup when you can, because it covers the scenarios a local drive cannot. But a local backup running today is worth more than a perfect plan you intend to set up at some point.