Two different ideas of “a safe copy”
An external drive is a physical device you own, plugged into a computer when needed. A cloud backup is a service that stores copies of your files on a company’s computers and reaches them over the internet. Both can protect your data, but they fail in different ways, which is why the choice is less about a winner and more about what you want to be protected from.
Convenience
Cloud backup is the easier option to keep running. Once configured, it usually works in the background whenever the device is online, with no cable to plug in and no routine to remember. Files can be reached from another device, which helps if your computer is stolen or destroyed.
External drives need a bit of effort. Some backup programs run automatically when the drive is connected, but if the drive sits in a drawer, nothing is being backed up. People tend to start with good intentions and drift. Setting a reminder, or leaving a drive connected to a desktop machine, helps, but connected drives are more exposed to certain risks, as discussed below.
Speed is another difference. A first cloud backup of a large photo library can take days or weeks on an ordinary home connection, and restoring everything can be slow too. A local drive copies and restores far faster, which matters when you need a full recovery in a hurry.
Cost
Costs look different over time.
- External drives are usually a one-time purchase. Larger capacities cost more, and you may want two drives for redundancy. Drives eventually wear out and need replacing, so the cost recurs only over a span of years.
- Cloud services usually charge a subscription that rises with storage. Small amounts may be free or cheap, while large archives can become a continuing expense. If you stop paying, you may lose access to stored files after a grace period, so read the terms.
Prices change often, so compare current offers rather than relying on a general rule. A reasonable approach is to estimate how much you need to protect, then compare the multi-year cost of each option.
Privacy and control
With an external drive, the data is physically with you. Nobody can see it unless they get the drive. The risk is theft or loss, which is why encrypting storage devices is worth doing: an encrypted drive that is lost is much less likely to expose your files.
With cloud backup, you trust a provider with your data. Reputable services protect files in transit and in storage, but practices differ. Some can technically read your files, while others offer a mode where only you hold the key. Consider:
- What the provider says about encryption and who can access your data
- Where data is stored and which legal rules apply to it
- Whether you can add your own password or key to the backup
- How strong your account protection is, since anyone who takes over the account can reach the copies
Using strong passwords and two-step sign-in on a storage account is not optional. A well-secured account is as important as the storage itself, and password managers make unique, strong passwords practical.
Reliability
Drives fail. Mechanical hard drives can be damaged by drops and age, and solid-state drives and memory cards can fail without much warning. Drives are also vulnerable to the same local events as your computer: fire, flood, theft and power surges. If your backup drive sits beside your computer, one event may take both.
Cloud services are generally run with redundancy and professional upkeep, and they sit away from your home. But they are not perfect. Accounts can be locked, services can change or shut down, and sync tools may faithfully copy deleted or damaged files. An account problem can cut you off from your data at the very moment you need it.
Connected storage of either kind can be reached by malicious software. Some ransomware looks for attached drives and mapped online folders. This is why versioning, where earlier file states are kept, and drives that are normally disconnected are so useful for backup ransomware recovery.
Putting it side by side
| Factor | Cloud backup | External drive |
|---|---|---|
| Effort once set up | Low | Moderate |
| Protection from fire or theft at home | Strong | Weak if kept at home |
| Restore speed for large amounts | Often slow | Usually fast |
| Ongoing cost | Subscription | Mostly one-time |
| Privacy control | Depends on provider | High if encrypted |
| Needs internet | Yes | No |
Using both
For anything important, using both is a sensible answer, and it matches the widely used 3-2-1 backup rule: several copies, on more than one type of storage, with one kept away from the original. A practical pattern is:
- Let a cloud service handle automatic, continuous protection of key folders and photos.
- Make a periodic full copy to an encrypted external drive, then disconnect it.
- Keep that drive somewhere other than your main workspace, such as at a relative’s home or in a secure place.
Choosing if you must pick one
If you only have the budget or patience for one, consider your biggest worry. If you tend to forget routines and worry about theft or disaster, cloud backup is likely the better first step. If you have a large library, a slow connection or strong privacy concerns, a pair of encrypted drives may suit you better. Either way, test the result occasionally, since a copy you have never restored from is only a hope.
No arrangement removes all risk, and services and prices change, so revisit your choice every year or two.