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    Ertas

    Notes from
    the work.

    Guides, research notes and what we learn building models.

    Sovereign AI vs Cloud AI: Data Residency Requirements by Country and Region

    A country-by-country reference guide to data residency requirements for AI training data, model weights, and cross-border transfers. Covers EU (GDPR + EU AI Act), US, UK, China, India, Saudi Arabia, UAE, Australia, Brazil, Canada, Japan, and South Korea — with enforcement dates and practical implications for enterprise AI deployment.

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