Data Storage vs Data Processing: The Distinction Engineers Miss (And Why Compliance Depends on It)

This article explains the critical distinction between where data is stored and where it is processed, showing how engineering teams often satisfy residency requirements but still trigger cross-border transfer and sovereignty obligations (e.g., GDPR) when data is accessed, replicated, or processed from other jurisdictions; it catalogs common failure patterns (admin access, cloud replication, backups, third-party processors) and recommends mapping data flows, treating access location as a compliance variable, auditing cloud defaults, building region-aware processing, and aligning vendor agreements to close the compliance gap.