Synology 8TB HAT3320 Plus Series SATA III 3.5" Internal NAS HDD

BH #SYHAT33208T • MFR #HAT3320-8T
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Synology 8TB HAT3320 Plus Series SATA III 3.5" Internal NAS HDD
Key Features
  • 8TB 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 8TB HAT3320 Plus Series SATA III 3.5" Internal NAS HDD from Synology delivers NAS-class reliability to ensure consistent performance in high-uptime and multiuser environments. The HAT3320 Plus has passed 500,000 hours of testing and has a mean time between failure (MTBF) rating of 1.2 million hours and a yearly workload rating of 300TB. It is air filled and features a storage capacity of 8TB, 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.
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Synology HAT3320 Plu Overview

Designed to meet the reliability, endurance, and performance requirements of 24/7 storage in small- and medium-sized business storage systems, the 8TB HAT3320 Plus Series SATA III 3.5" Internal NAS HDD from Synology delivers NAS-class reliability to ensure consistent performance in high-uptime and multiuser environments. The HAT3320 Plus has passed 500,000 hours of testing and has a mean time between failure (MTBF) rating of 1.2 million hours and a yearly workload rating of 300TB. It is air filled and features a storage capacity of 8TB, 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.

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 failure (MTBF) rating and 300TB 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: 846504006342

Synology HAT3320 Plu Specs

Key Specs
Total Capacity
8 TB
Drive Type
SATA III / 3.5" HDD (7200 rpm)
Read Speed
Sustained: 281 MB/s
Write Speed
Sustained: 281 MB/s
Total Capacity
8 TB
Drive Type
SATA III / 3.5" HDD (7200 rpm)
Performance
Read Speed
Sustained: 281 MB/s
Write Speed
Sustained: 281 MB/s
Encryption Support
No
Mean Time Between Failures (MTBF)
1.2 Million Hours
Endurance (Total Bytes Written)
300 TB
Electrical
Power Draw
9.07 W (Active)
5.74 W (Idle)
Input Power
5 to 12 VDC
General
Operating Conditions
41 to 140°F / 5 to 60°C
Operating Shock
686 G / 2.0 ms
Storage Conditions
-40 to 158°F / -40 to 70°C
Dimensions
5.8 x 4.01 x 1" / 147 x 101.85 x 26.1 mm
Weight
1.7 lb / 755 g
Packaging Info
Package Weight
1.865 lb
Box Dimensions (LxWxH)
8.9 x 6.1 x 2.9"

Synology HAT3320 Plu Reviews

Good but very expensive

By Keith
Rated 4 out of 5
Date: 2026-09-24

The drives worked perfectly in the DX517 expansion unit I put them in. I would complain that you are now required to use Synology drives in their units, but the prices of all hd's have almost doubled in the last two years. Blame the AI data centers. There may be other NAS units that work well, but Synology is impeccable, except for their AI support which I can only describe as arrogant. You need to get a human involved. Have encountered some weird software problems this time around adding an expansion unit, but the human in their engineering are really good.

Very easy

By John
Rated 5 out of 5
Date: 2026-06-24

After my older Synology DS220 started showing health issues, I upgraded to the DS223J with 16TB of storage. The data migration process was seamless. Kudos to B&H Photo for excellent packaging and prompt two-day shipping. The system is performing excellently.

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