The 3-2-1 backup rule: the simple strategy that actually protects your data

By the Archibou Team

Your photos, your documents, your projects — everything important lives on your computer or phone. And what happens tomorrow if your hard drive dies, your phone falls in water, or ransomware encrypts all your files? That's when backup comes in — and more specifically, the 3-2-1 rule.

What is the 3-2-1 rule?

The 3-2-1 rule is a simple and proven principle for protecting your data:

• 3 copies of your important data
• 2 different media (external drive, cloud, SSD…)
• 1 copy stored offsite (in a different physical location than your home)

You don't need to be a tech expert. What matters is redundancy: if one medium or location is destroyed, another copy exists elsewhere.

Why is it essential?

Accidents happen more often than you think

• Hard drives fail on average after 3 to 5 years
• Ransomware attacks have increased by over 70% in one year
• Fires, floods, and thefts respect no borders
• Smartphone failure is almost inevitable after 2-3 years

None of these situations are rare. But a single copy of your photos means a single failure is enough to lose everything.

How to apply the rule with Archibou?

Archibou is designed to play the role of your offsite copy — the one that saves you when everything else fails.

The 3 copies

1. Your device (computer, phone, tablet) — the active copy
2. A local medium — an external drive
3. Archibou cloud — your files synced and stored in France, with Clever-Cloud, under European jurisdiction

The 2 different media

• An external hard drive or SSD for the local copy
• Archibou cloud for the remote copy

Two different technologies, two distinct failure points.

The 1 offsite copy

Archibou hosts your data in France. In case of a local disaster (fire, theft, water damage), your cloud copy remains intact and accessible from any device.

Getting started in 3 steps

1. Install the Archibou Photos app on mobile or the Nextcloud app on desktop
2. Connect to https://archibou.cloud
3. Enable automatic sync — your files are copied in the background

Conclusion

Backup is not glamorous. But losing your family photos, important documents, or work projects is even less so. The 3-2-1 rule, set up in 3 minutes, gives you peace of mind for years to come.

With Archibou, the offsite copy is already taken care of. Just add a local one, and you're covered.