20TB storage capacity
The supplied product information lists an 20TB capacity.
A 20TB Synology Plus Series 3.5-inch SATA hard drive designed to meet the reliability, endurance and performance requirements of 24/7 storage in compatible Synology systems.

The Synology HAT3320-20T combines 20TB capacity, a helium-sealed drive design, 7,200 RPM operation and a typical maximum sustained data transfer speed of 295 MB/s.
Synology Plus Series drives are designed for always-on storage environments and are backed by a 1.2 million-hour MTBF rating and a 180TB/year workload rating. Conventional magnetic recording technology helps provide consistent performance for storage workloads.
More than 500,000 hours of compatibility and stress testing help ensure reliable operation in Synology systems. Available firmware updates can also be installed directly through Synology DiskStation Manager without removing the drive or using third-party tools.
Compare storage types, capacities and options in the DeviceDeal Storage & Hard Drives guide.
The Synology HAT3320-20T is covered by a three-year limited manufacturer warranty beginning from the purchase date shown on the purchase receipt. DeviceDeal is an authorised reseller of Synology products.
It is a 20TB, 3.5-inch SATA Plus Series hard drive designed for 24/7 storage in compatible Synology systems.
The HAT3320-20T provides 20TB of hard-drive capacity. Actual formatted and available capacity will be lower and varies according to formatting, configuration, software and operating system.
The HAT3320-20T uses a SATA interface with a 6 Gb/s interface speed and operates at 7,200 RPM.
Synology specifies a typical maximum sustained data transfer speed of 295 MB/s.
The HAT3320-20T uses conventional magnetic recording technology, also known as CMR.
The HAT3320-20T has a 1.2 million-hour MTBF rating and a workload rating of 180TB per year for data written, read or verified by commands from a host system.
Yes. Synology states that available drive firmware updates can be installed directly through DSM on a supported Synology storage system.
Synology specifies a three-year limited warranty beginning from the purchase date shown on the purchase receipt.
(HAT3320-20T)
An 20TB Synology HAT3320 Plus Series 3.5-inch internal SATA hard drive with a listed 7,200 RPM rotational speed and CMR recording technology.
The supplied product information lists an 20TB capacity.
The supplied specification lists a 3.5-inch hard-drive form factor.
The supplied product name lists SATA.
The supplied specification lists a rotational speed of 7,200 RPM.
The supplied information identifies the recording technology as CMR.
The supplied specification identifies the HAT3320-8T as an internal hard drive.
Synology HAT3320-20T Plus Series 20TB SATA 7,200 RPM Hard Drive
| Manufacturer part number | HAT3320-20T |
|---|---|
| Product series | Synology Plus Series |
| Brand | Synology |
| Product type | Internal hard drive |
| Designed usage | 24/7 storage in compatible Synology home and small-office systems |
| Capacity | 20TB |
|---|---|
| Form factor | 3.5-inch |
| Interface | SATA |
| Interface speed | 6 Gb/s |
| Sector size | 512e |
| Drive design | Helium-sealed |
| Recording technology | Conventional magnetic recording (CMR) |
| Rotational speed | 7,200 RPM |
|---|---|
| Cache | 1GB |
| Maximum sustained data transfer speed | 295 MB/s typical |
| MTBF | 1,200,000 hours |
|---|---|
| Workload rating | 180TB/year data write/read |
| Validation testing | More than 500,000 hours of compatibility and stress testing |
| Warranty | 3-year Synology limited warranty |
| Supply voltage | 12 V (±10%) / 5 V (+10%/-7%) |
|---|---|
| Idle power average | 4.35 W |
| Average operating power | 7.62 W |
| Operating temperature | 5°C to 60°C (41°F to 140°F) |
|---|---|
| Non-operating temperature | -40°C to 70°C (-40°F to 158°F) |
| Operating shock | 490 m/s², 2 ms duration |
| Non-operating shock | 1,960 m/s², 2 ms duration |
| Operating vibration | 5 Hz to 300 Hz: 7.35 m/s²; 300 Hz to 500 Hz: 2.45 m/s² |
| Non-operating vibration | 5 Hz to 500 Hz: 29.4 m/s² |
| Operating altitude | -304.8 m to 3,048 m |
| Non-operating altitude | -304.8 m to 12,192 m |
| Operating relative humidity | 5% to 90% R.H., no condensation |
| Non-operating relative humidity | 5% to 95% R.H., no condensation |
| Acoustics, idle | 20 dB typical |
|---|---|
| Acoustics, seek | 32 dB typical |
| Dimensions (H × W × D) | 26.1 × 101.85 × 147 mm |
| Weight | 730 g |
| Certifications | CE, RCM, BSMI, KC, UKCA, UL, TUV, ICES and RoHS |
|---|
| SKU | HAT3320-20T |
| Brand | SYNOLOGY |
| Shipping Weight | 1.0200kg |
| Shipping Width | 0.026m |
| Shipping Height | 0.150m |
| Shipping Length | 0.108m |
This product is supplied with Synology manufacturer warranty coverage.
Warranty coverage and claims are subject to Synology's applicable manufacturer warranty terms, eligibility requirements and product assessment. Please retain your DeviceDeal tax invoice as proof of purchase.
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