They were developed by Western Digital, and trial lots have already been sent to OEM partners and data center operators. These discs use EAMR technology (Energy-Assisted Magnetic Recording – magnetic recording with energy support). It allows you to increase the density of data storage. Also, the younger model uses the traditional recording method, while the more capacious one uses the tiled one.Disks have nine magnetic plates. Inside the case is filled with helium. The drives themselves are designed for the corporate sector. The availability of various systems to improve stability and safety is claimed. They have, for example, temperature and humidity sensors, as well as vibration compensation systems. The models received a limited five-year warranty and are designed to overwrite up to 550 TB of information per year. Mass deliveries are planned for 2020, prices have not yet been indicated.