Why an Independent Storage Layer Helps Build Sovereignty Architecture

In the first two articles of this series, I stated that sovereignty starts with where your data lives, and that real sovereignty means answering for all four dimensions, not just the location box.

As a quick recap:

• Data: governs where your data physically resides and who can access it

• Legal: determines which jurisdiction governs your data, and who holds override powers if someone comes asking

• Operational: ensures continuity and recovery even if a primary provider is disrupted

• Technical: preserves the ability to move, recover, and exit without vendor dependency

This article is about turning that framework into a decision you can actually make.

It starts with an admission that might sound strange coming from a storage vendor:

Today, there isn’t a fully sovereign stack available to European companies. And it’s impractical to think a sovereign stack can be built quickly. So where do we go from here?

Start from what’s actually possible

If you set out to build a fully EU-sovereign technology stack, top to bottom, you run into global supply chains, sub-processing dependencies, and the chips themselves. It's close to impossible today. Chasing that ideal tends to end in disappointment, or in trade-offs on cost and innovation that no business should have to make.

The goal is operational control, not purity.

Where a vendor is headquartered matters far less than whether you control the data operationally: where it sits, who can read it, whether you can move it, and whether you can recover it.

Operational control has to be the focus, because that’s the piece that actually reduces your risk. Once you accept that, sovereignty stops being an impossible mandate and becomes a series of practical decisions. The highest-leverage tactic is where you put your storage.

Why your storage decision carries the most weight

Storage is where sovereignty stops being abstract. It’s where control, retention, immutability, and recoverability become real. Writing sovereignty commitments won’t matter if the underlying data can be accessed, modified, moved, or locked by a third party outside your governance.

IDC calls selecting an independent object storage layer one of the most high-impact architectural decisions an EMEA organization can make, and I’d agree.

The reason is concentration: When your storage, compute, network, and applications all come from a single provider, your sovereignty posture is only as strong as that one provider’s jurisdiction, contract terms, and continuity commitments.

An independent storage layer, decoupled from the compute environment, breaks that dependency without forcing you to give up cloud economics.

Organizations are already moving this way. The IDC Spotlight shows 40% working to ensure continuous GDPR compliance, 37% choosing in-country technologies for select services, and 26% abstracting their data storage specifically to reduce vendor lock-in. These are deliberate, targeted moves to put control back where it belongs.

The four enablers

Portability isn’t a slogan. It rests on a handful of concrete technical enablers: S3-compatible APIs so your data speaks a standard language, storage decoupled from compute so the two can move independently, customer-controlled encryption keys, and immutability.

IDC expects this to become the norm. By 2027, it predicts 70% of the G5000 will re-engineer most of their core workloads to be portable across private and public cloud solutions.

Two of those enablers do the heaviest lifting for sovereignty and they’re the ones most often glossed over.

The first is customer-controlled encryption keys. When you create and hold your own keys, they never sit with your storage provider. That one move changes the whole risk picture. Even in the scenario that keeps people up at night, a foreign government issuing a legal demand for your data, keys you control render that data unreadable to anyone but you. Domicile debates get a lot of airtime, but key ownership settles most of the discussion.

The second is immutability. Data that can’t be altered or deleted is data you can trust to recover, whether the threat is ransomware, a mistake, or malicious interference. Wasabi extends this with a capability called Covert Copy™, which keeps an immutable, offline copy of your data, hidden and out of an attacker’s reach, at no additional fee beyond the storage it consumes. Immutability protects the data you can see. Covert Copy protects the copy an attacker doesn’t know to look for.

Control means you choose, not the provider

Real operational control shows up in the small decisions. Take a customer based in Germany who wants a second copy of its data in Italy. With an independent storage layer, that’s their call to make. They choose to replicate, they choose where, and the provider doesn’t move the data on its own. That’s the difference between residency that’s done to you and residency you direct.

It’s important to be mindful of where this matters most. The portability and no-egress-fee argument is strongest for your primary data, the data you’re actively using and may one day need to move. For secondary and tertiary backups, the calculus is different. That data often needs to sit out-of-region for business continuity, so if one region has a bad day, your recovery copy is somewhere else entirely.

An independent storage layer serves both. For primary data it preserves your freedom to move. For backups it gives you deliberate regional diversity.

What one layer can’t do

No single provider delivers end-to-end sovereignty, storage included. Your posture still depends on data classification, key management, policy design, and governance across the whole estate. Corporate domicile is also a separate question from operational data control, and buyers with the strictest requirements should evaluate it on its own terms.

That’s where proportionality comes in.

The mature organizations I talk to don’t apply the strictest controls to everything. They’ll look at 5,000 workloads and conclude that maybe 200 have strict domicile requirements. Those get the tightest treatment. The other 4,800 are free to benefit from the scale and economics of the public cloud. That’s what sovereignty looks like when it’s done with a clear head.

Where this leaves you

To pull the series together, we’ve explored the three kinds of control needed to achieve data sovereignty.

• Control your data, so you decide where it lives and who can read it.

• Control your ecosystem, so open standards keep you free to build the stack you want.

• Control your costs, so none of it rests on a bill you can’t predict.

An independent storage layer is where all three become concrete. It won’t make you sovereign on its own, but nothing else moves you further, faster, with less disruption.

Where your data lives will create a foundation. What you build on top of it is the architecture. And you can start building it today.

Sources:

[1] IDC Spotlight, sponsored by Wasabi, Cloud Without Compromise: Building Data Sovereignty into Your Infrastructure with a Resilience-First and Risk-Mitigating Approach (Doc #US54512826, May 2026)