Native B2 file action for this version.
B2 bucket ID that owns the file version.
File content length in bytes.
File content type recorded by B2.
Native B2 file ID bound to the S3 version ID.
User metadata associated with the file version.
Native B2 file name bound to the S3 object key.
OptionalserverServer-side encryption mode reported by B2, when present.
B2 upload timestamp in epoch milliseconds.
Native B2 file-version binding used to validate S3 version IDs.