Keep critical file services available with the Buffalo TeraStation 5420DN 80TB NAS. This 4-bay system ships with four 20 TB NAS hard drives preinstalled, giving you 80 TB of usable included capacity for shared storage, backups, and departmental data sets. 10GbE connectivity helps reduce bottlenecks when multiple users access large files, while RAID support adds the redundancy expected in business storage. Designed for infrastructure teams that need straightforward deployment and predictable operation, the 5420DN supports iSCSI for block-level use cases alongside standard NAS file sharing. That makes it a practical fit for mixed workloads where file services and application storage need to coexist on one platform. The TAA-compliant design also aligns with public sector and regulated procurement requirements. For organizations comparing entry-level NAS appliances, this model stands out by pairing prepopulated capacity with faster network throughput and business-class data protection. It is a strong choice when the goal is to replace ad hoc storage with a dedicated appliance that is easier to manage, easier to standardize, and better suited to shared production data.