4TB Storage Capacity
3.5″ Form Factor
SATA III 6 Gb/s Interface
256MB Cache

Designed to meet the reliability, endurance, and performance requirements of 24/7 storage in small- and medium-sized business storage systems, the 4TB HAT3300 Plus Series SATA III 3.5″ Internal NAS HDD from Synology delivers NAS-class reliability to ensure consistent performance in high-uptime and multi-user environments. The HAT3300 Plus has passed 300,000 hours of testing, has a Mean Time to Failure (MTTF) rating of 1 million hours, and a yearly workload rating of 180TB. Also featured is a storage capacity of 4TB, a SATA III 6 Gb/s interface, a 256MB cache, and a rotational speed of 5400 rpm, all of which help to ensure uninterrupted data transfers with sustained speeds of up to 202 MB/s.

Reliable Always-On Operation
Backed by 1 million hours MTBF and 180TB/year workload rating.

Tested for Maximum Reliability
Stringent validation and up to 300,000 hours of testing ensure reliability in Synology systems.

Seamless Firmware Updates
Firmware updates can be performed directly in Synology DSM.

Reliable Recording Technology
Conventional magnetic recording (CMR) technology offers consistent performance.

Engineered for Endurance
Synology Plus Series HDDs are backed by a 1 million hour Mean Time Between Failures (MTBF) rating and 180TB per year workload rating, which is up to three times the limit of conventional desktop hard drives. Over 300,000 hours of compatibility and stress testing ensure smooth operation even under multi-user workloads.

Convenient Firmware Updates
Users are automatically notified when firmware updates become available for Synology Plus Series HDDs and can update drives seamlessly from DiskStation Manager (DSM) on their Synology storage system, eliminating the need for third-party tools and disk removal for firmware updates.