Designed to meet the reliability, endurance, and performance requirements of 24/7 storage in small and medium-sized business storage systems, the 12TB HAT3310 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 HAT3310 Plus has passed 500,000 hours of testing, has a Mean Time Between Failure (MTBF) rating of 1.2 million hours, a yearly workload rating of 180TB, and is filled with helium instead of regular air. Also featured is a storage capacity of 12TB, a SATA III 6 Gb/s interface, a 512MB cache, and a rotational speed of 7200 rpm, all of which help to ensure uninterrupted data transfers with sustained speeds of up to 281 MB/s.
Ask Our Experts800-606-6969
Hello, Log InAccount & Orders
Key Features
- 12TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 512MB Cache
Designed to meet the reliability, endurance, and performance requirements of 24/7 storage in small and medium-sized business storage systems, the 12TB HAT3310 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 HAT3310 Plus has passed 500,000 hours of testing, has a Mean Time Between Failure (MTBF) rating of 1.2 million hours, a yearly workload rating of 180TB, and is filled with helium instead of regular air. Also featured is a storage capacity of 12TB, a SATA III 6 Gb/s interface, a 512MB cache, and a rotational speed of 7200 rpm, all of which help to ensure uninterrupted data transfers with sustained speeds of up to 281 MB/s.
More DetailsSynology HAT3310 Plus Internal HDD Overview
Reliable Always-On Operation
Backed by a 1.2 million hours MTBF and 180TB per year workload rating.
Tested for Maximum Reliability
Stringent validation and up to 500,000 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 1.2 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 500,000 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.
UPC: 846504005581
Synology HAT3310 Plus Internal HDD Specs
Key Specs
| Total Capacity | |
| Drive Type | |
| Read Speed | |
| Write Speed |
| Total Capacity | |
| Drive Type |
Performance
| Read Speed | |
| Write Speed | |
| Encryption Support | |
| Mean Time Between Failures (MTBF) | |
| Endurance (Total Bytes Written) |
Electrical
| Power Draw |
General
| Operating Conditions | |
| Storage Conditions | |
| Dimensions | |
| Weight |
Packaging Info
| Package Weight | |
| Box Dimensions (LxWxH) |
Synology HAT3310 Plus Internal HDD Reviews
available and Synology-branded
By Richard
Rated 3 out of 5
Date: 2026-10-08
I purchased "Synology" drives for my new DS225+ for only two reasons: 1) availability when I needed them, and 2) lack of trust in Synology and their attitude about non-"Synology" drives. They are not subjectively different in performance, noise, operating temperature, or power consumption from the 8-year-old HGST Deskstar NAS drives in my DS218+. They are still working after two weeks, but the key attribute of a HDD, reliability in the long term, cannot be judged for years. Given my previous experiences with Toshiba HDDs, my expectation of long term reliability of these branded Toshiba HDDs is not high. Time will tell.
Fast BH shipping, it works.
By Ronald
Rated 5 out of 5
Date: 2026-04-11
not much to say, mostly, I am glad I could even find a 7200 rpm, 12GB drive. BH had stock when most did not. I recently bought 4 Seagate 12GB drives and one arrived dead on Arrival, BH quickly replaced and expedited shipping. I Put it in the NAS drive, it worked, that is all I need.
See any errors on this page?
Are these compatible with UGREEN NAS systems?
Are these compatible with UGREEN NAS systems?
Yes, the Synology 12TB HAT3310 Plus Series SATA III 3.5" Internal NAS HDD will be supported by UGREEN NAS enclosures.
Date published: 2026-04-15
Is this compatible with my Synology DS223 2 bay sy
Is this compatible with my Synology DS223 2 bay system that I bought from you?
The Synology 12TB HAT3310 Plus Series SATA III 3.5" Internal NAS HDD (B&H # SYHAT3310122) is compatible with the Synology NAS DS223.
Date published: 2026-05-17
can I use 4 of these with my sinology ds418 4 bay ...
can I use 4 of these with my sinology ds418 4 bay ?
The Synology 12TB HAT3310 Plus Series SATA III 3.5" Internal NAS HDD (2-Pack) is compatible with the Synology DS418 NAS enclosure.
Date published: 2025-05-20
Are these CMR drives?
Are these CMR drives?
Yes, this Synology 16TB HAT3310 Plus Series SATA III 3.5" Internal NAS HDD is CMR.
Date published: 2024-05-31
Is this drive compatible with the DS218+?
Is this drive compatible with the DS218+?
Yes, this Synology 16TB HAT3310 Plus Series SATA III 3.5" Internal NAS HDD will be compatible with the DS218+ NAS enclosure. HAT3310-16T is listed as a compatible drive in Synology's list here: https://bit.ly/4os70on.
Date published: 2025-10-31
Can I do 2 of these with 2 4 TB Synology Drives ...
Can I do 2 of these with 2 4 TB Synology Drives at 5400 RPMS?
Yes, the Synology Plus Series Drive can be used alongside two 4TB Synology drives at 5400 RPM.
Date published: 2025-11-24