In the previous post, we explored why backups are essential and what really counts as a true backup. Now it’s time to learn about the “golden standard” of data protection — the “3-2-1” backup rule. This is a simple yet incredibly effective strategy that can help you reduce the risk of data loss to virtually zero.

What is the “3-2-1” Rule?

The “3-2-1” rule is a backup methodology that recommends:

✅ 3 — Have at least three copies of your data
(the original + two backup copies)

✅ 2 — Store those copies on two different types of media
(for example, HDD + cloud or SSD + NAS)

✅ 1 — Keep at least one copy offsite
(protection against local disasters)

Detailed Breakdown of Each Point

🔢 Three Copies of Your Data

💽 Two Different Types of Media

Examples of combinations:

• Internal SSD + external HDD
• Tape drive + cloud storage
• NAS + flash drives

Why it matters:
Different media have different vulnerabilities — using multiple types protects you from a widespread hardware failure.

🏢 One Copy Offsite

Implementation options:

• ☁️ Cloud services (Backblaze, Yandex.Cloud, Wasabi)
• 🖥️ Remote server / VPS
• 🚗 Physical media stored in a different building

Critical importance:
Protects against fires, floods, theft, and other local disasters that could destroy all local copies.

Advantages of the “3-2-1” Strategy

✔ Maximum fault tolerance
✔ Flexible recovery scenarios
✔ Protection from 99% of threats
✔ Compliance with industry standards

🛠 How to Implement “3-2-1” for a Small Business

1. Original data:

• Files on work computers
• Databases on a server

2. Local backup:

• External HDD with automatic backups (e.g., via Time Machine)
• NAS with RAID array

3. Offsite backup:

• Cloud solution (Backblaze B2 from $5/TB)
• Rotation of external drives (keep one always offsite)

💡 Tip: Start small — even an external drive + cloud already gives you above-average protection.

The “3-2-1” rule is not just a recommendation, but a time-tested strategy that gives business owners confidence in the safety of their digital assets. In the next and final post, we will take a closer look at popular cloud backup services, including Backblaze, that can help you implement the offsite part of this strategy.