HAT5320-4T Synology 4TB SATA III (6Gb/s) 3.5" Enterprise HDD

High-Performance 3.5-inch Enterprise SATA HDD engineered for NAS capacity tiers with the HAT5320-4T

The HAT5320-4T is a 3.5-inch enterprise hard drive designed to extend Synology NAS and private cloud platforms with predictable, 24x7-rated SATA storage. Built for standard SATA 6Gb/s drive bays, the HAT5320-4T aligns with controller and backplane architectures where sequential throughput, consistent latency, and stable thermals matter more than peak IOPS, enabling efficient capacity expansion without changing the existing host platform.

With a 7200 RPM spindle design, the HAT5320-4T targets multi-user file services, backup windows, and bulk storage pools where sustained performance supports rebuild behavior and background integrity tasks. As a SATA device, it fits cleanly into PCIe-connected HBA/RAID paths and NAS SoC storage stacks, allowing architects to scale bays while maintaining a familiar operational model for drive monitoring, replacement cycles, and power budgeting across dense enclosures.

Why Choose the HAT5320-4T?

The HAT5320-4T provides an enterprise-focused capacity-to-cost profile for SATA tiers in Synology deployments, balancing density with operational predictability. The HAT5320-4T supports scalable growth from small arrays to larger multi-bay systems, while its 24x7 design intent and controlled power draw help maintain consistent service levels in always-on storage clusters and branch-office appliances.

Synology engineers storage components with a systems approach, focusing on sustained reliability, integration with NAS management workflows, and alignment with modern data centre expectations for continuous operation, serviceability, and stable behavior under mixed workloads.

Key Applications:

• NAS and private cloud capacity expansion
• Backup repositories and retention tiers
• Archive and cold-to-warm data pools
• General-purpose enterprise file storage

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your Synology storage rollout, and an extended warranty of up to 6 years to protect long-term deployments of the HAT5320-4T across multiple sites.