Phononic lattice storage was the method of data collection in the Death Star Library, rather than the practice of holding holobooks, tapes, and holocrons. It allowed for the storage of a large amount of information in a small space, something which the Death Star had only at a premium. Atour Riten supervised droids that scanned information into the database from other media, which had extensive files, top-notch broadcast-to-reader circuitry, and retrieval systems thick with memory for faster downloads.