This locale-typed field classifies this direct-attached FC storage connection as either an 'internal' construct (built and managed automatically by UCS Manager) or an 'external' one exposed for direct admin configuration. For a Fibre Channel connection from the fabric interconnect straight to a storage array's FC ports, bypassing any upstream FC/FCoE SAN switch, this distinction matters because internal locale objects are recreated automatically if deleted, while external ones represent an admin's own uplink/storage configuration and will not silently reappear if removed. Most hand-configured instances like this one report 'external', since they correspond to physical uplinks or storage connections an admin wired up rather than auto-generated internal plumbing.