The 3-2-1 Rule: The digital "life insurance" that every SME in Mallorca should activate by 2026

We’re starting the year, and surely your company has reviewed its sales targets and expenses. But has anyone checked whether you would survive a black Monday? Imagine arriving at the office in the industrial estate and the server won’t start. Or worse, a ransomware attack has encrypted your accounting system.

We don’t want to be alarmist; we want to be practical. That’s why today at Infotelecom we’re not going to talk about products, but about strategy. We explain the standard methodology used by IT directors at large multinationals, adapted so you can apply it in your SME today.

The Golden Rule: The 3-2-1 Method

To ensure that a file is “immortal,” it must strictly meet these three requirements:

1. Keep 3 copies of your data
It’s not enough to have the original file and “one copy just in case.” You need three instances.

• Why it’s useful: Statistics show that the probability of three devices failing at the same time is almost zero.

2. Store them on 2 different media
Having three copies is pointless if all three are on the same external hard drive or on the same office NAS server. If that device suffers a power surge or a mechanical failure, you lose all three.

• Practical tip: Combine technologies. For example: Main server + disconnected external hard drive + cloud.

3. Keep 1 copy off-site
This is where 90% of companies in Mallorca fail. If there’s a fire, a physical theft at the office, or a flood, the backups you keep on-site will disappear along with the originals.

• Practical tip: You need to take the data out of the building. In the past, the manager would take a hard drive home. Today, that’s a security risk (GDPR) and highly impractical.

The common mistake: “The slow cloud”

When looking for that external copy, many companies contract generic public clouds (Google Drive, Dropbox, or cheap servers abroad). Expert advice: beware of the RTO (Recovery Time Objective). If you have 1 terabyte of data on a server in Singapore and need to restore it after a disaster, the download can take days depending on your connection and network congestion. Can your business be down for 48 hours waiting for the download bar to finish?

The optimal solution: Look for a local repository

By keeping the off-site copy in a data center on the island itself (such as those in Son Castelló), latency is minimal and recovery is almost immediate. You comply with the “off-site” rule (outside your office) while maintaining the speed of having it “next door.”

Your checklist for this week:

1. Check whether you have at least one automated backup (that doesn’t rely on someone remembering to run it).

2. Verify where that backup is physically located. If the office burns down, does the backup burn down too?

3. Run a drill: try to recover an old file. If it takes more than 15 minutes, you have an efficiency problem.

At Infotelecom Networks, we help companies comply with the 3-2-1 rule using our own infrastructure in the Balearic Islands. If you have doubts about your security strategy, contact us.

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