Technical reference
Synology Plus Series HAT3320-20T 20TB specifications
One 20TB HAT3320-20T · 3.5-inch SATA · CMR
Complete specifications with requirements, upgrade limits and sources. For our buying judgment, reviews and prices, return to the buying guide.
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Search all 37 specifications, including conditions and limits.
Identity & capacity
Exact drive and storage layout
| Exact model | HAT3320-20T[1] |
|---|---|
| Capacity | 20 TB[1] Decimal raw capacity; formatting and redundancy reduce usable space. |
| Form factor | 3.5-inch[1] |
| Sector format | 512e[1] |
| Recording technology | CMR[1] Conventional magnetic recording; not SMR. |
| Drive design | Helium-sealed[1] |
Interface & performance
NAS use & service
Workload, MTBF, 3-year warranty, DSM firmware path, and sampled HCL pairing notes.
| Workload rating | 180 TB/year[1] Data read, written or verified by host commands; not a capacity or lifetime guarantee. |
|---|---|
| MTBF | 1,200,000 hours[1] A population statistical rating, not the expected life of an individual drive. |
| Limited warranty | 3 years[1] Starts on the purchase date on the receipt; confirm region and serial eligibility. |
| Duty design | 24/7 NAS operation[1] |
| Firmware updates | Through Synology DSM[1] On a supported Synology system when an update is available. |
| NAS compatibility | Recommended on sampled Plus NAS internal-tray lists; still check your exact model[2][9] 2026-09-11 HCL samples listing HAT3320-20T as Published/recommended: DS923+, DS224+, DS1522+, DS1825+. Listings can change. This 20TB SKU is HAT3320-20T, not HAT5310-20T Enterprise. |
| HCL DSM note (sampled) | DSM 7.2.2-72806 or later before installing[9] Shown on HCL notes for DS923+/DS224+/DS1522+/DS1825+. Newer DSM floor than HAT3310-16T's 7.2-64570 note. |
| HCL firmware package | MG11_MN11_SATA_1401.ftd (listed firmware 1401)[9] Different package family from HAT3310-16T (MG09_MN09). Do not copy 16TB HAT3310 measurements onto this 20TB SKU. |
| Warranty region / thermal cutoff | 3-year limited warranty from receipt; support follows purchase country[1][10][6] Manufacturer term is 3 years. A Newegg PDP template showed 5 years on 2026-09-11; treat that as a merchant display until the receipt/policy matches. The warranty clause ends drive coverage when recorded temperature equals or exceeds the specified operating limit. |
Power & acoustics
Power conditions and sound ratings
| Supply voltage | 12 V ±10%; 5 V +10% / −7%[1] |
|---|---|
| Active idle power | 4.35 W[2][11] Manufacturer typical; platform and configuration affect consumption. |
| Random read / write power | 7.62 W[2][11] Manufacturer typical, 4KB Q1. Not startup power or a whole-NAS measurement. |
| Idle / seek acoustics | 20 / 32 dB[1] Manufacturer typical values; the datasheet does not specify distance or weighting. Do not treat these as measured room noise. |
Environment & handling
Operating limits
| Operating temperature | 5°C to 60°C[1] |
|---|---|
| Nonoperating temperature | −40°C to 70°C[1] |
| Operating shock | 490 m/s²[1] 2 ms duration. |
| Nonoperating shock | 1960 m/s²[1] 2 ms duration. |
| Operating vibration | 5–300 Hz: 7.35 m/s²; 300–500 Hz: 2.45 m/s²[1] |
| Nonoperating vibration | 5–500 Hz: 29.4 m/s²[1] |
| Operating altitude | −304.8 to 3048 m[1] |
| Nonoperating altitude | −304.8 to 12,192 m[1] |
| Operating relative humidity | 5–90%, noncondensing[1] |
| Nonoperating relative humidity | 5–95%, noncondensing[1] |
Dimensions & installation
Fit and handling
| Dimensions | 26.1 × 101.85 × 147 mm[1] Height × width × depth. |
|---|---|
| Weight | 730 g[1] |
| Certifications | CE, RCM, BSMI, KC, UKCA, UL, TUV, ICES, RoHS[1] |
| Handling | Protect against electrostatic discharge[1] Ground yourself and avoid touching the connectors or circuit board. |
Exact product identity & open questions
- Exact drive
- HAT3320-20T, 20TB, 3.5-inch SATA[1]
- Purchase configuration
- One new internal HDD; no NAS enclosure included[3]
- Exact-model original testing: No original HAT3320-20T lab benchmark with a documented method was adopted. Other Plus capacities were not substituted.
- Calibrated acoustics: No instrumented enclosure dBA for HAT3320-20T.
- Some US PDPs blocked this round: B&H, Adorama, Amazon, Best Buy, Walmart and Micro Center were blocked or empty. Historical dated rows retained. Newegg was reread at $819.99.
- Long-term reliability: No population failure study. MTBF is not an individual lifespan prediction.
- Exact-model lab testing: Unbox video is not a benchmark. No HAT3320-20T lab speed/noise method was adopted.
- Video audio / complete ASR: Only sparse authored captions 0:00–7:46 plus one identity frame. No original-audio listening; no claim of complete speech.
Sources
Research updated Sep 11, 2026. Individual source check dates are listed below. Measurements belong to the named reviewers; tested configurations and software versions may differ from the product you buy.
- [1] Synology Plus Series SATA HDD datasheet, PLUSHDD3320-2026-ENU-REV000 ↗
Checked Sep 10, 2026 · Pages 1–4 and safety page; exact HAT3320-20T column
- [2] Synology Plus Series — hardware specifications and compatibility ↗
Checked Sep 8, 2026 · HAT3320-20T column; 4KB Q1 power conditions and compatibility link
- [3] B&H — HAT3320-20T listing ↗
Checked Sep 8, 2026 · Selected capacity / exact MPN and main new-product offer
- [4] Adorama — HAT3320-20T listing ↗
Checked Sep 8, 2026 · Selected capacity / exact MPN and main new-product offer
- [5] Best Buy — HAT3320-20T listing ↗
Checked Sep 8, 2026 · Selected capacity / exact MPN and main new-product offer
- [6] Newegg — HAT3320-20T listing ↗
Checked Sep 8, 2026 · Selected capacity / exact MPN and main new-product offer
- [7] Amazon: HAT3320-20T current US new listing ↗
Checked Sep 10, 2026 · Exact MPN in title; selected new main buy box provides Add to cart and shows seller Amazon Germany; numeric price is hidden behind cart.
- [8] Newegg: HAT3320-20T current US new listing ↗
Checked Sep 10, 2026 · Exact MPN in H1; selected main offer shows Add to cart, seller Newegg, and a visible price of $819.99.
- [9] Synology compatibility list API — internal tray HDD rows ↗
Checked Sep 11, 2026 · findHclList tab=drives sampled Plus NAS; HAT3320-20T hcl_id 38029 firmware 1401 MG11_MN11_SATA_1401.ftd
- [10] Synology limited warranty ↗
Checked Sep 11, 2026 · Section 2.1 start date; Section 2.3 drive temperature termination; country-of-purchase support
- [11] Synology Product Spec HAT3320-20T ENU ↗
Checked Sep 11, 2026 · HAT3320-20T page; last updated Apr 23, 2026; Active Idle 4.35 W; Random Read/Write 4KB Q1 7.62 W; 295 MB/s
- [12] niat — 2026-05-08 HAT3320 20TB receipt/unbox ↗
Checked Sep 11, 2026 · Authored captions 0:00–7:46; 6:20 frame label HAT3320-20T 20TB; description self-bought replacement, Johor, published 2026-05-09. Not full-speech ASR.
Research and review record
- Research: Grok 4.6 · Source research and data update
- Self-check: Grok 4.6 · Researcher self-check
- Independent review: GPT-6 (Codex) · Exact official full datasheet, visually checked capacity columns and footnotes, official live product table, sampled HCL entries and notes, warranty clauses, original primary merchant offers; original community text where relevant and prior parent related-model original reads reused. Partial evidence coverage retained; no lab benchmark invented.
- Editorial integration: GPT-6 (Codex) · Editorial integration and validation
Independent review completed for the scope recorded in the audit.
Source evidence and review history (JSON)