Sparse Bundles were always chunked (and introduced at the same time as TimeMachine). Sparse Images were single file, but could grow to accommodate additional da

Sparse Bundles were always chunked (and introduced at the same time as TimeMachine). Sparse Images were single file, but could grow to accommodate additional data. IIRC, networked TimeMachine backups (say, to a TimeCapsule) always have used sparse bundles.