Synology HAT3300-4T 4TB SATA HDD Plus Series 3.5"

The Synology HAT3300-4T is a purpose-built 3.5-inch SATA hard drive designed to operate around the clock inside Synology NAS systems. With a 1 million hour MTBF rating and a 180 TB/year workload capacity, it targets small and medium businesses that need dependable, always-on storage without the premium price of enterprise-class drives. The use of Conventional Magnetic Recording (CMR) is a key advantage, ensuring stable and predictable write performance even during sustained operations like RAID rebuilds or large backup jobs—an area where cheaper SMR-based drives can struggle.

What sets the HAT3300-4T apart from generic NAS drives is its deep integration with Synology's ecosystem. Each drive undergoes up to 300,000 hours of compatibility testing with Synology hardware, and firmware updates are delivered and applied directly through Synology DSM, eliminating the need to source and flash firmware manually. The 5,400 RPM spindle speed keeps acoustics and thermals in check, making it well-suited for office or home environments where noise matters. While the 4TB capacity won't satisfy users building large media libraries, it remains a practical and cost-effective option for file serving, backups, and surveillance storage in smaller Synology deployments.