Executive summary
- World Backup Day falls on 31st March every year, and while the “remember to back up” message is well-intentioned, the real threat in 2026 is more unsettling than simply forgetting.
- Modern ransomware gangs specifically target backups first, quietly disabling or corrupting them weeks before launching an attack – so that when the moment comes, there’s nothing to recover from.
- The solution is immutable, tested backups that attackers can’t touch – and making sure your Microsoft 365 data is covered, too.
Introduction
The 31st of March has a couple of things going for it.
First, it’s the day before April Fool’s Day. And second, it’s World Backup Day – which, if you’ve ever had the misfortune of losing critical business data, feels like anything but a joke.
The day was created back in 2011 with a simple mission: remind people to back up their data. And, for a long time, that message was enough. The main risks were hardware failure, accidental deletion, and the occasional flood in the server room.
But in 2026, the threat landscape looks very different.
Most businesses do have backups. The problem is that modern ransomware gangs know this – and they’ve spent years figuring out how to get to your backups before you do.
The uncomfortable truth about ransomware
The classic ransomware story goes like this: attackers break in, encrypt your files, and demand a ransom. You restore from backup and get on with your day. Problem solved.
Except that story is increasingly out of date.
Modern ransomware groups are patient. Once inside a network, they often sit quietly for days or even weeks – the average dwell time (the period during which attackers remain undetected) before an attack launches is now around 10 to 11 days. During that time, they’re not only looking for valuable data to steal. They’re also hunting for your backups.
But this isn’t an isolated tactic. It’s more like standard practice. And it explains a statistic that should give every business owner pause for thought: in 2025, 24% of ransomware victims ended up paying out to the attackers.
With proper backup discipline, this number could (and should) be much lower.
Why “we have a backup” isn’t the same as “we’re protected”
If ransomware groups are specifically targeting backups, the question isn’t whether you have one – it’s whether yours could survive an attack.
A backup that lives on the same network as your main systems is vulnerable. A backup stored in a cloud account that uses the same credentials as everything else is vulnerable. A backup that has never actually been tested to confirm it can be restored is arguably the most dangerous of all – it gives you false confidence without any guarantee it will work when you need it.
The other risk that’s worth raising is one that surprises a lot of businesses: Microsoft 365 is not automatically a backup.
Many businesses assume that because their email, documents, and Teams chats live in the cloud, they’re inherently safe. But Microsoft’s responsibility under its shared responsibility model covers the infrastructure, not your data. If a file is accidentally deleted, corrupted by ransomware, or wiped by a departing employee, Microsoft is under no obligation to restore it.
Without a dedicated Microsoft 365 backup solution in place, that data could simply be gone.
What a solid backup strategy actually looks like
Don’t worry – there is some good news here. And that’s that this is a well-understood problem with clear, practical solutions.
Here’s what best practice looks like in 2026:
- Follow the 3-2-1-1-0 rule. Keep 3 copies of your data, on 2 different types of storage, with 1 stored offsite, 1 stored offline or air-gapped – and 0 unverified backups.
- Use immutable backups. An immutable backup is one that can’t be changed, encrypted, or deleted for a set period – even by an administrator. Using WORM (write once, read many) controls or Object Lock means that even if an attacker compromises your admin credentials, the backup remains intact.
- Test your restores regularly. A backup you’ve never tested is a backup you’re just hoping will work. Schedule regular restore tests – not just checking that the backup ran successfully, but actually recovering files and verifying they’re intact.
- Back up your Microsoft 365 data separately. Dedicated Microsoft 365 backup solutions ensure that your email, SharePoint, OneDrive, and Teams data has its own independent recovery path – completely separate from Microsoft’s own infrastructure.
- Know your recovery targets. Two questions every business should be able to answer: how much data can we afford to lose (your Recovery Point Objective), and how long can we survive without our systems (your Recovery Time Objective)? If you don’t have clear answers, your backup strategy isn’t complete.
Use March 31st as your checkpoint
World Backup Day is a good opportunity for organisations to stop and ask an uncomfortable question: if ransomware hit us tomorrow, would our backups actually save us?
For a lot of businesses, the honest answer is “probably not as well as we’d like.” If that sounds familiar, now is exactly the right time to do something about it.
So, whether you want to review your existing backup strategy, get a dedicated Microsoft 365 backup solution in place, or just understand what your current setup would and wouldn’t survive, we can help. Speak to your Get Support Customer Success Manager or call our friendly team on 01865 594 000.