The Best Protection Against Ransomware: Immutable Backup Storage

What would you do if you arrived at work tomorrow and all your files were gone?

Not just missing—but locked, encrypted, held hostage by criminals demanding a hefty ransom to unlock them.

Unfortunately, that’s the harsh reality of ransomware. And the threat is growing.

Why ransomware is a growing threat to UK businesses

In the first quarter of 2025, ransomware attacks surged by 84% compared to the same period last year.

It’s no longer a question of if your business will be targeted—but when.

Recent research shows that two-thirds of businesses have fallen victim to ransomware in the past two years. That statistic alone should make you ask: Is your business prepared?

What is ransomware — and why are backups under attack?

Ransomware is a type of cyber attack where criminals break into your systems, encrypt your data, and demand payment to restore access.

It’s ruthless.

And it doesn’t stop with your everyday files. Studies reveal that 96% of businesses hit by ransomware also had their backups targeted.

The attackers know your backup is your safety net—and they’re aiming to destroy it.

What is immutable backup storage?

This is where immutable backup storage comes in.

“Immutable” means unchangeable. Once your backup data is saved, it cannot be edited, deleted, or overwritten, even by someone with administrative privileges.

Imagine locking your vital data inside a vault, throwing away the key, yet still having a secure way to access it when needed.

From air-gapped backups to modern cloud solutions

Traditionally, businesses protected backups by storing them on physically disconnected devices—known as air-gapped storage.

Now, modern cloud-based immutable backups offer the same robust security without bulky hardware or complex routines.

Why isn’t every business using immutable backups?

Here’s the problem: while 81% of IT professionals agree immutable backups are the best protection against ransomware, only 59% of businesses currently use them.

That’s worrying.

Security hardening alone—firewalls, anti-virus, user permissions—is no longer enough. When ransomware breaches these defences, your last line of defence is your backups.

They need to be untouchable.

Adopt a “breach mentality” — prepare to recover, not just prevent

The smart approach is to assume an attack will happen.

That means preparing your recovery plan—not just prevention.

Investing in immutable backup storage could be the difference between a manageable incident and business disaster.

When ransomware strikes, having secure, quickly accessible backups lets you restore data without paying a ransom.

Want to learn more about how immutable backups protect your business?
Check out the National Cyber Security Centre’s guidance on backup security for trusted expert advice.

Need help reviewing your backup strategy or setting up immutable storage?

Contact our team today or say hi in the on page chat and we’ll support you every step of the way.