**Internal (Managed)**: Hive owns data. DROP TABLE deletes data. Warehouse directory.
**External**: Data outside Hive. DROP TABLE removes only metadata; data persists. LOCATION specified.
**When External**: Raw data, staged data, shared with other systems (Spark, Presto). Retention requirements.
**When Internal**: Hive-only temp, derived tables. Hive controls lifecycle.
**Scalability Trade-offs**: External = no accidental data loss on DROP....
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