Synology 12TB HAT3310 Plus Series SATA III 3.5" Internal NAS HDD

The Synology HAT3310-12T is a 12TB internal hard drive created for users who run their data around the clock on a Synology NAS. It slides into any 3.5-inch bay with a 6 Gb/s SATA interface and immediately offers room for large media libraries, virtual machine images, surveillance footage, or years of family photos without pushing the storage pool to its limits.

Inside, the drive spins at 7200 rpm and pairs that speed with a 512 MB cache. This combination lets it sustain transfer rates up to 281 MB/s, so tasks such as multi-user file sharing, scheduled backups, and video editing over the network feel responsive instead of sluggish. Because it uses conventional magnetic recording, write performance stays predictable even as the drive fills up.

Reliability is where the Plus Series stands out. Synology rates the HAT3310-12T for a 180 TB annual workload, 1.2 million hours mean time between failures, and testing that exceeds 500 000 hours inside real Synology enclosures. A helium-filled design keeps internal friction low, which reduces heat and power consumption during nonstop operation. Those figures make the drive a solid fit for busy small business servers, creative studios that push large video projects daily, or home labs that never power down.

Management is straightforward thanks to firmware updates delivered directly through Synology DiskStation Manager. There is no need to pull the drive or connect it to a separate system; the NAS handles version checks and installs during routine maintenance windows.

Whether you are consolidating scattered external drives, expanding an existing RAID array, or planning a new multi-bay NAS, this Plus Series model gives you enterprise-style stamina without the complexity of enterprise firmware. Drop it into a Synology chassis, build your storage pool, and let it run.

• 12 TB capacity for expansive data sets and media collections
• Engineered for 24 hour, seven day operation inside Synology NAS systems
• 7200 rpm spindle speed combined with a 512 MB cache for quick access to frequently used files
• Sustained data transfer rates up to 281 MB/s keep backups and large transfers moving
• Rated for 180 TB of data writes per year to support heavy workloads
• Mean time between failures of 1.2 million hours for long-term dependability
• Helium-sealed design lowers heat output and power draw
• Conventional magnetic recording maintains consistent performance across the entire platter
• Tested for more than 500 000 hours in Synology hardware to verify real-world stability
• Firmware updates delivered directly through Synology DSM for effortless maintenance
• 3.5-inch form factor with a 6 Gb/s SATA interface for easy integration
• Backed by a limited three-year manufacturer warranty