Published 2026-10-15
Computers fail, phones get lost and files get deleted by mistake. A backup is a second copy of your files so you can recover. A widely used idea for doing it well is called the 3-2-1 rule.
The reasoning is simple. If something goes wrong with one copy, you still have another.
List the files you could not replace: family photos, documents, financial records, work files. These are your priority. Programs can usually be reinstalled, but your personal files cannot.
A drive you connect to your computer and copy files to. It is simple and works without internet. The downside is that it can be lost, damaged or stolen along with your computer if you keep them together.
Your files are stored on a provider's servers. This protects against theft, fire and flood at home. Check the provider's privacy and security information, and the cost over time, since prices and plans change.
Some homes use a small network storage device. It is more advanced, but it can back up several devices.
A backup you have to remember is a backup that gets forgotten. Use the built-in backup tools in your operating system, or settings in your cloud service, to run on a schedule.
Once in a while, try to restore a file. A backup you have never tested might not work when you need it.
Do not forget them. Turn on your device's backup feature, and keep photos backed up to a second place.
Use strong passwords, and consider encrypting your external drive if it holds sensitive files. Keep the drive in a safe place.
Pick your most important folder, and make one extra copy right now. You can improve your system step by step.
This is general information. For business or sensitive data, check the rules that apply to you.
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