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Synology

Synology Plus Series NAS HDD SATA 6Gb/s - 4TB to 20TB

Synology Plus Series NAS HDD SATA 6Gb/s - 4TB to 20TB

£299.75
£299.75
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Storage Size

The Synology Plus Series NAS HDD is a purpose-built 3.5-inch hard drive designed for Synology NAS systems in home and small office environments. Using 100% conventional magnetic recording (CMR) technology, it delivers consistent write performance across its lifespan and is validated for smooth 24/7 operation under multi-user workloads. It suits users who want a drive that has been tested and optimised specifically for Synology DSM rather than a generic desktop or enterprise alternative.

Why this product

CMR technology for consistent write performance

100% conventional magnetic recording means write speeds remain stable throughout the drive's lifespan, avoiding the performance dips associated with SMR technology.

Validated for 24/7 multi-user NAS workloads

Each drive undergoes stringent compatibility and stress testing — up to 300,000 hours — to confirm reliable continuous operation inside Synology enclosures.

High MTBF ratings across the range

Air-filled models carry a 1,000,000-hour MTBF rating; helium-sealed 12 TB, 16 TB and 20 TB models are rated at 1,200,000 hours.

Firmware updates managed inside DSM

Drive firmware can be applied directly through Synology DiskStation Manager without removing the drive or using separate tools.

3-year warranty included

All capacities carry a 3-year manufacturer warranty.

  • Capacity4 TB
  • Rotational Speed5,400 rpm
  • Cache256 MB
  • Max. Sustained Transfer Speed202 MB/s
  • Drive DesignAir
  • MTBF1,000,000 hours
  • Workload Rating180 TB/year
  • Warranty3 Years
  • SKUSYN-527-4TB
  • EAN4711174725120
  • Designed and validated for use in Synology NAS enclosures running DiskStation Manager (DSM).
  • Connects via SATA 6 Gb/s — compatible with any enclosure or host controller supporting the SATA III standard.
  • 3.5-inch form factor fits standard NAS drive bays.
  • Validated for Synology systems specifically; compatibility with other NAS brands should be confirmed against those vendors' hard drive compatibility lists.
  • 12 TB, 16 TB and 20 TB models use helium-sealed enclosures; ensure your NAS environment can accommodate these if operating in low-pressure or high-altitude conditions.
  • Not designed as a desktop or direct-attached personal storage drive; intended for always-on NAS environments.

Best for

  • Synology NAS owners who want drives that have been validated and stress-tested for their specific enclosure and DSM software.
  • Home and small office users running 24/7 NAS workloads with multiple concurrent users accessing shared storage.
  • Users who value consistent write performance — CMR technology avoids the variable write speeds of SMR designs.
  • Those needing high-capacity helium-sealed options — 12 TB, 16 TB and 20 TB models offer 1,200,000-hour MTBF and higher sustained transfer speeds.
  • Users who want in-system firmware management — firmware updates are handled directly within DSM without drive removal.

Trade-offs

  • High-throughput workloads — the 4 TB and 6 TB models are rated at 180 TB/year workload and 202 MB/s sustained transfer, which may be limiting for write-intensive applications.
  • Non-Synology NAS systems — these drives are purpose-built and validated for Synology enclosures; compatibility with other platforms is not guaranteed by the vendor.
  • Desktop or single-user direct-attached use — the drives are designed for always-on NAS environments, not casual personal storage.
  • Enterprise or data-centre deployments — with a 3-year warranty and home/small office workload ratings, these are not positioned as enterprise-grade drives.
Using 100% conventional magnetic recording (CMR) technology, Plus Series disk drives ensure consistent write performance throughout their lifespans. Synology Plus Series drives are subjected to thorough compatibility and stress testing to ensure smooth 24/7 operation under multi-user workloads.

General

BrandSynology
ModelHAT3300-4T
Form Factor3.5"
InterfaceSATA 6 Gb/s
Sector Size512e
Recording TechnologyConventional Magnetic Recording (CMR)
Drive DesignAir
Warranty3 Years

Drive

Capacity4 TB
Rotational Speed5,400 rpm
Cache256 MB

Performance

Max. Sustained Data Transfer Speed (Typ.)202 MB/s

Reliability

MTBF1,000,000 hours
Workload Rating180 TB/year

Every option side by side. Rows that differ between them are highlighted — those are the ones worth deciding on.

4 TB - HAT3300-4T 6 TB - HAT3300-6T 8 TB - HAT3320-8T 12 TB - HAT3310-12T 16 TB - HAT3310-16T 20 TB - HAT3320-20T
Capacity4 TB6 TB8 TB12 TB16 TB20 TB
Rotational Speed5,400 rpm5,400 rpm7,200 rpm7,200 rpm7,200 rpm7,200 rpm
Cache256 MB256 MB256 MB512 MB512 MB1 GB
Max. Sustained Transfer Speed202 MB/s202 MB/s281 MB/s281 MB/s281 MB/s295 MB/s
Drive DesignAirAirAirHelium-sealedHelium-sealedHelium-sealed
MTBF1,000,000 hours1,000,000 hours1,000,000 hours1,200,000 hours1,200,000 hours1,200,000 hours
Workload Rating180 TB/year180 TB/year300 TB/year180 TB/year180 TB/year300 TB/year
Warranty3 Years3 Years3 Years3 Years3 Years3 Years

The Synology Plus Series NAS HDD is a purpose-built 3.5-inch hard drive designed for Synology NAS systems in home and small office environments. Using 100% conventional magnetic recording (CMR) technology, it delivers consistent write performance across its lifespan and is validated for smooth 24/7 operation under multi-user workloads. It suits users who want a drive that has been tested and optimised specifically for Synology DSM rather than a generic desktop or enterprise alternative.

  • CMR technology for consistent write performance — 100% conventional magnetic recording means write speeds remain stable throughout the drive's lifespan, avoiding the performance dips associated with SMR technology.
  • Validated for 24/7 multi-user NAS workloads — Each drive undergoes stringent compatibility and stress testing — up to 300,000 hours — to confirm reliable continuous operation inside Synology enclosures.
  • High MTBF ratings across the range — Air-filled models carry a 1,000,000-hour MTBF rating; helium-sealed 12 TB, 16 TB and 20 TB models are rated at 1,200,000 hours.
  • Firmware updates managed inside DSM — Drive firmware can be applied directly through Synology DiskStation Manager without removing the drive or using separate tools.
  • 3-year warranty included — All capacities carry a 3-year manufacturer warranty.
4 TB - HAT3300-4T
Capacity 4 TB
Rotational Speed 5,400 rpm
Cache 256 MB
Max. Sustained Transfer Speed 202 MB/s
Drive Design Air
MTBF 1,000,000 hours
Workload Rating 180 TB/year
Warranty 3 Years
6 TB - HAT3300-6T
Capacity 6 TB
Rotational Speed 5,400 rpm
Cache 256 MB
Max. Sustained Transfer Speed 202 MB/s
Drive Design Air
MTBF 1,000,000 hours
Workload Rating 180 TB/year
Warranty 3 Years
8 TB - HAT3320-8T
Capacity 8 TB
Rotational Speed 7,200 rpm
Cache 256 MB
Max. Sustained Transfer Speed 281 MB/s
Drive Design Air
MTBF 1,000,000 hours
Workload Rating 300 TB/year
Warranty 3 Years
12 TB - HAT3310-12T
Capacity 12 TB
Rotational Speed 7,200 rpm
Cache 512 MB
Max. Sustained Transfer Speed 281 MB/s
Drive Design Helium-sealed
MTBF 1,200,000 hours
Workload Rating 180 TB/year
Warranty 3 Years
16 TB - HAT3310-16T
Capacity 16 TB
Rotational Speed 7,200 rpm
Cache 512 MB
Max. Sustained Transfer Speed 281 MB/s
Drive Design Helium-sealed
MTBF 1,200,000 hours
Workload Rating 180 TB/year
Warranty 3 Years
20 TB - HAT3320-20T
Capacity 20 TB
Rotational Speed 7,200 rpm
Cache 1 GB
Max. Sustained Transfer Speed 295 MB/s
Drive Design Helium-sealed
MTBF 1,200,000 hours
Workload Rating 300 TB/year
Warranty 3 Years
  • ✓ Designed and validated for use in Synology NAS enclosures running DiskStation Manager (DSM).
  • ✓ Connects via SATA 6 Gb/s — compatible with any enclosure or host controller supporting the SATA III standard.
  • ✓ 3.5-inch form factor fits standard NAS drive bays.
  • Note: Validated for Synology systems specifically; compatibility with other NAS brands should be confirmed against those vendors' hard drive compatibility lists.
  • Note: 12 TB, 16 TB and 20 TB models use helium-sealed enclosures; ensure your NAS environment can accommodate these if operating in low-pressure or high-altitude conditions.
  • ✗ Not designed as a desktop or direct-attached personal storage drive; intended for always-on NAS environments.

Best for:

  • Synology NAS owners who want drives that have been validated and stress-tested for their specific enclosure and DSM software.
  • Home and small office users running 24/7 NAS workloads with multiple concurrent users accessing shared storage.
  • Users who value consistent write performance — CMR technology avoids the variable write speeds of SMR designs.
  • Those needing high-capacity helium-sealed options — 12 TB, 16 TB and 20 TB models offer 1,200,000-hour MTBF and higher sustained transfer speeds. (12 TB - HAT3310-12T, 16 TB - HAT3310-16T, 20 TB - HAT3320-20T only)
  • Users who want in-system firmware management — firmware updates are handled directly within DSM without drive removal.

Trade-offs:

  • High-throughput workloads — the 4 TB and 6 TB models are rated at 180 TB/year workload and 202 MB/s sustained transfer, which may be limiting for write-intensive applications. (4 TB - HAT3300-4T, 6 TB - HAT3300-6T only)
  • Non-Synology NAS systems — these drives are purpose-built and validated for Synology enclosures; compatibility with other platforms is not guaranteed by the vendor.
  • Desktop or single-user direct-attached use — the drives are designed for always-on NAS environments, not casual personal storage.
  • Enterprise or data-centre deployments — with a 3-year warranty and home/small office workload ratings, these are not positioned as enterprise-grade drives.
Using 100% conventional magnetic recording (CMR) technology, Plus Series disk drives ensure consistent write performance throughout their lifespans. Synology Plus Series drives are subjected to thorough compatibility and stress testing to ensure smooth 24/7 operation under multi-user workloads.
4 TB - HAT3300-4T

General

Brand Synology
Model HAT3300-4T
Form Factor 3.5"
Interface SATA 6 Gb/s
Sector Size 512e
Recording Technology Conventional Magnetic Recording (CMR)
Drive Design Air
Warranty 3 Years

Drive

Capacity 4 TB
Rotational Speed 5,400 rpm
Cache 256 MB

Performance

Max. Sustained Data Transfer Speed (Typ.) 202 MB/s

Reliability

MTBF 1,000,000 hours
Workload Rating 180 TB/year
6 TB - HAT3300-6T

General

Brand Synology
Model HAT3300-6T
Form Factor 3.5"
Interface SATA 6 Gb/s
Sector Size 512e
Recording Technology Conventional Magnetic Recording (CMR)
Drive Design Air
Warranty 3 Years

Drive

Capacity 6 TB
Rotational Speed 5,400 rpm
Cache 256 MB

Performance

Max. Sustained Data Transfer Speed (Typ.) 202 MB/s

Reliability

MTBF 1,000,000 hours
Workload Rating 180 TB/year
8 TB - HAT3320-8T

General

Brand Synology
Model HAT3320-8T
Form Factor 3.5"
Interface SATA 6 Gb/s
Sector Size 512e
Recording Technology Conventional Magnetic Recording (CMR)
Drive Design Air
Warranty 3 Years

Drive

Capacity 8 TB
Rotational Speed 7,200 rpm
Cache 256 MB

Performance

Max. Sustained Data Transfer Speed (Typ.) 281 MB/s

Power & environment

Active Idle Power (Typ.) 5.74 W
Avg Read/Write Power (Typ.) 9.07 W

Reliability

MTBF 1,000,000 hours
Workload Rating 300 TB/year
12 TB - HAT3310-12T

General

Brand Synology
Model HAT3310-12T
Form Factor 3.5"
Interface SATA 6 Gb/s
Sector Size 512e
Recording Technology Conventional Magnetic Recording (CMR)
Drive Design Helium-sealed
Warranty 3 Years

Drive

Capacity 12 TB
Rotational Speed 7,200 rpm
Cache 512 MB

Performance

Max. Sustained Data Transfer Speed (Typ.) 281 MB/s

Reliability

MTBF 1,200,000 hours
Workload Rating 180 TB/year
16 TB - HAT3310-16T

General

Brand Synology
Model HAT3310-16T
Form Factor 3.5"
Interface SATA 6 Gb/s
Sector Size 512e
Recording Technology Conventional Magnetic Recording (CMR)
Drive Design Helium-sealed
Warranty 3 Years

Drive

Capacity 16 TB
Rotational Speed 7,200 rpm
Cache 512 MB

Performance

Max. Sustained Data Transfer Speed (Typ.) 281 MB/s

Reliability

MTBF 1,200,000 hours
Workload Rating 180 TB/year
20 TB - HAT3320-20T

General

Brand Synology
Model HAT3320-20T
Form Factor 3.5"
Interface SATA 6 Gb/s
Sector Size 512e
Recording Technology Conventional Magnetic Recording (CMR)
Drive Design Helium-sealed
Warranty 3 Years

Drive

Capacity 20 TB
Rotational Speed 7,200 rpm
Cache 1 GB

Performance

Max. Sustained Data Transfer Speed (Typ.) 295 MB/s

Reliability

MTBF 1,200,000 hours
Workload Rating 300 TB/year

EAN/MPN:

4 TB - HAT3300-4T: 4711174725120

6 TB - HAT3300-6T: 4711174725137

8 TB - HAT3320-8T: 4711174726349

12 TB - HAT3310-12T: 4711174725588

16 TB - HAT3310-16T: 4711174725595

20 TB - HAT3320-20T: 4711174726561

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Shipping

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Returns

  • Tech-Syndicate offers a full money-back guarantee for all purchases made on our store. If you’re not satisfied with the product that you have purchased from us, we will provide a full refund no questions asked.
  • A full reimbursement can be provided within 45 days since the purchase of the item.
  • Unfortunately, after the 45-day period you will no longer be eligible and won't be able to receive a refund. Therefore, we encourage our customers to try the product in the first four weeks after their purchase to ensure it fits their needs.