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Synology HAT3320-20T 20TB Plus Series 3.5in SATA HDD 7200rpm 1GB Cache CMR for Synology NAS

Price:

$ 1,320.59


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Synology HAT3320-20T 20TB Plus Series 3.5in SATA HDD 7200rpm 1GB Cache CMR for Synology NAS

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Synology HAT3320-20T Plus Series 20 TB 3.5in SATA hard drive for Synology NAS. SATA 6 Gb/s interface, 512e sectors, 7,200 rpm helium-sealed design with 1 GB cache and CMR recording. Maximum sustained transfer speed 295 MB/s (typical). Rated for 180 TB/year workload and 1,200,000-hour MTBF for 24/7 operation, with over 500,000 hours of Synology compatibility and stress testing. Firmware updates install directly through Synology DSM. 4.35 W active idle, 7.62 W average operating power. Weight 730 g. 3-year limited warranty. Genuine Synology from ARC IP Networks, authorised Synology reseller with Australian stock.

$ 1,320.59 1320.59 AUD $ 1,320.59 incl. GST

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HAT3320-20T

Synology HAT3320-20T at a glance

The Synology HAT3320-20T is a 20 TB Plus Series 3.5" SATA 6 Gb/s hard drive built for 24/7 operation in Synology home and small office NAS systems. It spins at 7,200 rpm with a 1 GB cache and CMR recording, delivers up to 295 MB/s sustained transfer, and is rated for 180 TB/year workload with a 1,200,000-hour MTBF.

ARC IP Networks is an authorised Synology reseller in Australia. We supply the genuine Synology HAT3320-20T from Australian stock.

Capacity20 TB, 3.5" SATA
Speed7,200 rpm, 295 MB/s
Reliability1.2M hours MTBF
Warranty3 years

Best for

  • Populating Synology DiskStation and RackStation systems in homes and small offices
  • Always-on file sharing and backup storage in multi-user environments
  • Large media, surveillance archive and backup libraries that need the highest Plus Series capacity per bay

Key features

20 TB capacity in a 3.5" form factor with a SATA 6 Gb/s interface and 512e sector size.

Conventional magnetic recording (CMR) for consistent write performance over the drive's life.

7,200 rpm helium-sealed design with 1 GB cache and up to 295 MB/s maximum sustained transfer speed.

Rated for 180 TB/year workload and a 1,200,000-hour MTBF for 24/7 NAS operation.

Validated through over 500,000 hours of compatibility and stress testing in Synology systems.

Firmware updates are notified and installed directly in Synology DSM, without removing the drive.

Synology reports up to 36% faster sequential reads than similar-class third-party drives in its testing (12 drives on an RS2423RP+, RAID 5).

Power draw of 4.35 W active idle and 7.62 W average operating power.

Listed by Synology as an optional Plus Series drive for the DS925+, DS425+ and DS1525+.

Synology HAT3320-20T specifications

Synology HAT3320-20T technical specifications
SpecificationValue
General
Capacity20 TB
Form factor3.5"
InterfaceSATA 6 Gb/s
Sector size512e
Drive designHelium-sealed
Recording technologyCMR
Performance & Reliability
Rotational speed7,200 rpm
Cache1 GB
Max sustained transfer (typical)295 MB/s
MTBF1,200,000 hours
Workload rating180 TB/year
Warranty3 years
Power
Supply voltage12 V (±10%) / 5 V (+10/-7%)
Active idle (typical)4.35 W
Average operating power (random read/write 4KB Q1)7.62 W
Environment
Operating temperature5°C to 60°C
Non-operating temperature-40°C to 70°C
Operating shock490 m/s² (2 ms)
Non-operating shock1,960 m/s² (2 ms)
Operating humidity5% to 90% RH, non-condensing
Acoustics (idle / seek, typical)20 dB / 32 dB
Physical & Certification
Size (H x W x D)26.1 mm x 101.85 mm x 147 mm
Weight730 g
CertificationsCE, RCM, BSMI, KC, UKCA, UL, TUV, ICES, RoHS

Figures from Synology's official product specifications.

The Synology HAT3320-20T in depth

Built for Synology systems

Synology Plus Series HDDs are designed for the reliability, endurance and performance needs of 24/7 storage in Synology home and small business NAS. The 20 TB HAT3320-20T uses CMR recording, a 7,200 rpm helium-sealed design and a 1 GB cache, delivering up to 295 MB/s sustained transfer.

Endurance and testing

The drive is rated for 180 TB/year workload and a 1,200,000-hour MTBF, and Plus Series drives go through over 500,000 hours of compatibility and stress testing. Synology covers it with a 3-year limited warranty.

Simple firmware maintenance

DSM notifies you when new drive firmware is available and installs it in place, so there is no need for third-party tools or removing disks from the NAS.

Frequently asked questions

Straight answers about the Synology HAT3320-20T from the ARC IP Networks team. Last reviewed October 2026.

It uses conventional magnetic recording (CMR); Synology states the Plus Series is 100% CMR for consistent write performance.

It spins at 7,200 rpm with a 1 GB cache and a SATA 6 Gb/s interface, with a maximum sustained transfer speed of 295 MB/s (typical).

Synology lists the HAT3300 Plus Series as an optional drive for systems including the DS925+, DS425+ and DS1525+, and promotes the series for the RS422+ and DS223. Check Synology's compatibility list for your exact model.

The 20 TB model is rated for a 1,200,000-hour MTBF and a 180 TB/year workload.

Synology provides a 3-year limited warranty from the purchase date.

ARC IP Networks is an authorised Synology reseller and supplies the HAT3320-20T from Australian stock.

Explore the full Synology range: Shop all Synology · NAS and storage guides

Buy the Synology HAT3320-20T in Australia

ARC IP Networks is an authorised Synology reseller, supplying Synology NAS, rackmount storage, drives, surveillance and backup appliances to homes, businesses and integrators across Australia.

  • Genuine Synology with the full manufacturer's warranty, supplied from Australian stock.
  • Australian stock, shipped Australia-wide.
  • Local pre-sales help sizing drives, RAID and backup for your NAS.
  • Trade and project pricing available.

Planning a Synology storage project?

Ask ARC IP Networks for project pricing or a NAS and drive bundle quote, or call us to check the right Synology model for your data.

Brand Synology
Synology HAT3320-20T Datasheet.pdf
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Accurate Shipping Costs

Our online shipping calculator is designed to provide a final, accurate shipping cost based on the items in your cart and your delivery postcode. Shipping costs are calculated at checkout based on your order and delivery postcode. The final cost is calculated based on several factors which are automatically accounted for by our system, including:

  • The stock location of the item(s) across our warehouses.
  • Orders with multiple items that may require special packaging.
  • The weight and dimensions of the order (including heavy or oversized items).
  • The delivery courier servicing your specific region.

Delivery Times


 

Standard Processing


Most orders placed by 2pm AEDT are dispatched for next working day delivery. Larger orders may require 1-2 additional business days for processing. If timing is critical, please contact us to discuss expedited options (additional charges may apply).


Delivery Timeframes


Region

Processing Time

Express Delivery

Standard Delivery

VIC, NSW, SA, QLD Metro, TAS

1-2 business days

1-2 business days

2-4 business days

NT, WA, QLD Rural

1-2 business days

1-2 business days

3-5 business days

New Zealand

1-2 business days

2-3 business days

4-10 business days

Please note: Processing times may extend during peak periods such as Christmas and end of financial year.

Free Warehouse Pickup



Save on shipping costs with free pickup from our ARC IP Networks Blackburn warehouse. Simply place your order online or by phone, and collect during business hours (Monday to Friday). Please allow time for picking and packing. For urgent orders, call 1300 100 440 to confirm your order is ready.

ARC IP Networks Pickup Address: 6 George Street, Blackburn, VIC 3130


Insurance & Tracking



All ARC IP Networks shipments are fully insured and trackable. Once dispatched, you'll receive an email with your tracking number and courier website details. If your item is confirmed lost or damaged by our courier, we'll arrange a replacement in consultation with you.


International Shipping



ARC IP Networks ships to New Zealand. Please note:


  • Import duties and taxes vary by country
  • Buyers are responsible for all customs charges
  • Contact your local customs authority before ordering
  • We'll provide required documentation for smooth customs clearance
  • Buyers cover all shipping costs for returns due to refused duties/taxes


Delivery Requirements


Signature Required


All deliveries must be signed for. If you won't be home, contact our Sales Support team to arrange Authority to Leave. Important: Authority to Leave voids shipping insurance if parcels are lost or stolen.


Delivery Restrictions


We do not deliver to PO Boxes or Parcel Lockers as our couriers cannot access them. Orders sent to these addresses will be returned, incurring redelivery fees.


Shipping Issue Resolution


ARC IP Networks works closely with our shipping partners to resolve any delivery issues quickly and fairly:


  1. Confirmation: We verify expected delivery dates with our shipping partners
  2. Investigation: Issues outside normal timeframes trigger formal investigations
  3. Communication: We keep you updated throughout the resolution process
  4. Resolution: Confirmed lost items are replaced or refunded after investigation completion


Please note: Refunds for lost, missing, or delayed orders cannot be processed until shipping partner investigations are complete. This does not affect your rights under the Australian Consumer Law, and refunds or replacements will be provided where required once loss or damage is confirmed.

Warranty & Faulty Products

ARC IP Networks complies with the Australian Consumer Law (ACL).

If a product is faulty, damaged, not of acceptable quality, or does not perform as advertised, you are entitled to a repair, replacement, or refund in accordance with ACL.

Manufacturer Warranty Returns

For faults developing after 14 days within the warranty period:

  • Contact ARC IP Networks first at info@arcip.com.au or 1300 100 440
  • We will assess the issue and coordinate with manufacturers, authorised service centres, or distributors on your behalf
  • Where required, a manufacturer RMA may be arranged
  • ARC IP Networks manages the return process and next steps

Dead on Arrival (DOA)

Products that arrive faulty or damaged must be reported within 14 days of delivery.

ARC IP Networks will arrange assessment, replacement, or refund as appropriate.

Change of Mind & Non-Faulty Returns

Change-of-mind returns must be requested within 14 days of delivery. For change-of-mind returns, the product must be unused, unopened, in its original packaging, and returned with all accessories and documentation. These conditions apply only to change-of-mind returns and do not limit or exclude your rights under the Australian Consumer Law. Some products are not eligible for change-of-mind returns, including:

  • Ex-demo products
  • Clearance or markdown items
  • Special-order items
  • Products clearly marked “No Change-of-Mind Returns”

Important

This does not affect your rights under Australian Consumer Law.

If a product is faulty, not of acceptable quality, or does not meet advertised specifications, it remains eligible for return regardless of category.

Refunds & Processing Timeframes

  • Approved refunds are processed within 7 business days of receiving returned goods
  • Refunds are issued to the original payment method, unless otherwise agreed
  • Replacement or repair may be offered where appropriate
  • Store credit may be offered only with customer consent

Handling fees and non-returnable service charges may not be refundable where permitted by law.


Restocking Fees

For approved change-of-mind or non-faulty returns, a 15% restocking fee applies.

  • Any applicable restocking fee will be clearly communicated prior to return approval
  • The fee will be deducted from the refund amount
  • Restocking fees do not apply to returns made under the Australian Consumer Law, including faulty, damaged, or misrepresented goods.

Return Shipping Costs

  • Change-of-mind returns: The customer is responsible for return shipping costs.
  • Faulty or defective products: ARC IP Networks covers return shipping under Australian Consumer Law.

Non-Warranty Repairs

For issues not covered by warranty:

  • ARC IP Networks will provide a quote before proceeding
  • Customers are responsible for all shipping and service costs
  • No repairs are undertaken without customer approval

Return Methods

Returns may be made:

  • In-store at ARC IP Networks – 6 George Street, Blackburn VIC 3130
  • Or by shipment as instructed by our support team

Proof of purchase is required for all returns.

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