The IBM 1722-7360 represents the capability to attach two EXP700/710 expansion units to the DS4300 storage system, significantly enhancing the system's storage capacity and scalability. This expansion option allows businesses to scale their storage infrastructure in response to growing data volumes without disrupting existing operations. The EXP700 and EXP710 are external expansion enclosures designed to accommodate additional disk drives, providing a seamless and cost-effective way to expand storage capacity. By incorporating these expansion units, the DS4300 can support a larger number of drives, enabling higher data availability and performance levels suitable for a wide range of applications and workloads. This attachment feature is particularly beneficial for organizations experiencing rapid data growth, offering a scalable and flexible solution to meet increasing storage requirements while maintaining high levels of data management efficiency and reliability.