Which cloud storage type uses an opaque value or descriptor to categorize and organize data?

Volume storage (block storage) presents storage as raw blocks that operating systems format into file systems, not using opaque values for individual data categorization.

Object storage stores data as discrete units called objects, each uniquely identified by an opaque value (a key or ID) and often accompanied by metadata, enabling flexible categorization and organization without a traditional hierarchical file system.

Structured data refers to data organized in a fixed schema (like a relational database), describing the data's format rather than a storage type characterized by opaque values for organization.

Unstructured data describes the content's lack of predefined format; while object storage often holds unstructured data, it is not the storage type itself that uses opaque values for organization.