Why does data centre location alone not guarantee data sovereignty?

Because sovereignty is determined by legal jurisdiction over the provider, not the physical location of the servers. The US CLOUD Act, enacted in 2018, grants US law enforcement the authority to compel any US headquartered company to hand over data in its possession or control, regardless of where that data is stored. A US provider running servers in Frankfurt or Amsterdam is still legally obligated to comply with a US government data access request, even if doing so directly conflicts with GDPR Article 48, which prohibits transfers of personal data to third country authorities without a proper legal basis under EU law.

This is not a theoretical risk. The CJEU's Schrems II ruling invalidated the EU US Privacy Shield on precisely this basis, and the European Data Protection Board has confirmed that service providers subject to EU law cannot legally disclose personal data to US authorities based on CLOUD Act requests alone.

GLBNXT resolves this conflict structurally by working exclusively with vendors headquartered in Europe and operating under European legal jurisdiction. No component of the platform is subject to the CLOUD Act or any equivalent extraterritorial legislation. Data access requests can only be made through European legal channels with full judicial oversight. This means organisations using GLBNXT do not inherit the compliance risk that comes with any dependency on a US controlled provider, and European data protection law applies without conflict from foreign legislation.