What 20TB changes in a NAS plan
Its capacity can reduce the number of bays needed, but rebuild and restore planning becomes more important. Calculate formatted space, redundancy, snapshots and backup copies before deciding how many drives to buy.[1]
Synology · NAS hard drive buying guide
Synology Enterprise Series 20TB (HAT5310-20T) Buying Guide
Product facts and dated cost
Synology Enterprise Series 20TB · Exact identity: HAT5310-20T
20TB decimal capacity · CMR · SATA 6 Gb/s
Catalog amount: $1,069.99 · historical · Price record: 2026-09-27T05:36:07.994399+00:00. Tax and shipping excluded.
Historical price observation. Recheck the price and availability before buying; this is not a current offer.
Enterprise Series 20TB: specifications and dated store comparison →20TB decimal for higher-workload Synology arrays, with the exact HAT5310-20T revision kept separate.
One Synology Enterprise Series 20TB HAT5310-20T internal SATA hard drive. NAS enclosure and other drives sold separately.
This guide checks the exact HAT5310-20T specifications, separates related-revision evidence and records dated US offers. Newegg’s September 11 primary new offer was $1,149.99, sold by Adorama. The captured shipping charge was $9.10; prices exclude tax. ChooseCompute has not tested this drive. See evidence and test gaps ↓
Is 20TB Enterprise Series storage right for your NAS?
A 20TB-per-bay capacity plan
One drive provides 20TB decimal before formatting; redundancy and growth allowance still reduce practical headroom.[1]
Higher-workload synology arrays
The documented 550TB/year at Enterprise-series scope and family features support this intended class, within the exact host compatibility boundary.[1]
Quiet storage beside a desk
Published acoustic labels and review observations, when available, do not predict resonance or seek noise in your enclosure.[1]
A workload that needs proven latency or application speed
The evidence does not establish performance for every array, network, database or virtual-machine workload.[1]
HAT5310-20T exact specifications
Full specifications ↗Follow any specification for its full conditions and sources.
Living with it
Capacity, power, cooling and sound for HAT5310-20T
What the 281 MB/s rating does and does not say
The rating is useful for checking the exact HAT5310-20T column. It does not guarantee a network transfer rate or random-I/O result, and it should not be copied to a neighboring MPN.[1]
How much confidence the available testing adds
No suitable exact-MPN original performance test was found, so the buying advice rests on specifications. ChooseCompute has not tested this drive.[1]
HAT5310-20T is not automatically HAT5320-20T
The sibling HAT5320-20T product specification lists 295 MB/s typical sustained and 4.35 W active idle. Those figures describe HAT5320-20T. The retained HAT5310-20T page still states 281 MB/s and 4.38 W idle. Match the complete suffix on the listing.[1][7][2]
What still needs a real-world test
We have verified the specifications, but have not found an original test that we can reliably apply to this exact model. The advice above follows the documented features; performance, noise and long-term reliability are not independently established here.
Before you buy
Current and historical HAT5310-20T listings and ownership costs
Compare current and dated US listings
Newegg listed the exact new HAT5310-20T for $1,149.99, sold by Adorama, in the September 11 observation. $9.10 shipping made the captured total $1,159.09 before tax. B&H retains its August 30 observation. Recheck delivered cost and stock before buying.[8][3]
Compare the delivered unit and seller
Check HAT5310-20T, new condition, seller, regional warranty channel, shipping and return terms. A marketplace product page does not by itself identify the current seller.[8][3]
Budget for the storage layout
A mirrored or parity-protected layout may require multiple drives, while a separate backup needs additional storage. Compare total delivered cost for the complete plan.[1]
Compare stores for this exact model
One Synology Enterprise Series 20TB HAT5310-20T internal SATA hard drive. NAS enclosure and other drives sold separately. Check the total delivered price at the store.
Current price needs checking
Check stores below
5 stores · 0 recent price observations
B&H
Seller not recorded
$1,069.99
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 5:36:07 AM UTC[9]
View exact product at B&HAdorama
Seller not recorded
$1,149.99
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 4:14:28 AM UTC[10]
View exact product at AdoramaNewegg
Sold by Adorama
$1,149.99
Historical price
Stock not confirmed · New
One 20TB HAT5310-20T internal 3.5-inch SATA HDD
Observed shipping: $9.10
Observed Oct 9, 2026, 1:19:36 AM UTC[12]
View exact product at NeweggBest Buy
Sold by antonline
$1,199.05
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 4:18:27 AM UTC[11]
View exact product at Best BuyAmazon
Sold by Marketplace seller not reverified
Check price
Stock not confirmed · New
One 20TB 3.5-inch SATA HDD
Shipping cost and US delivery eligibility require a fresh check. Historical reference only. Recheck seller, stock, price, quantity, warranty channel, shipping and tax before ordering.
Observed Aug 31, 2026[5]
View exact product at AmazonPrices are dated observations. Confirm the model, seller, condition, stock and delivered total at the store. Older prices remain visible as history. Links may earn a commission.
HAT5310-20T questions before buying
How much usable space will 20TB provide?
Less than the decimal label after formatting, and less again when the chosen redundancy layout reserves capacity. Leave room for growth and snapshots.[1]
What should I verify before ordering HAT5310-20T?
Confirm the full MPN, seller, new condition, NAS compatibility, firmware support, mounting fit and delivered price. Recheck every historical merchant listing.[1][8]
Has ChooseCompute tested this drive?
No. This guide synthesizes manufacturer documents, retained merchant records and any clearly identified third-party original tests; each result keeps its setup limits.[1]
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 Product Spec — HAT5310-20T ↗
Checked Sep 11, 2026 · Pages 1–3; last updated May 29, 2026
- [2] Synology HAT5300 Data Sheet (family table) ↗
Checked Sep 11, 2026 · Apr 24 2026 table uses HAT5320-20T at 20 TB, not this retained revision
- [3] B&H: HAT5310-20T historical US listing ↗
Checked Aug 30, 2026 · Catalog record dated 2026-08-30: exact MPN, new condition, seller status retailer, availability in-stock. Historical catalog reference price $1069.99. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.
- [4] Adorama: HAT5310-20T historical US listing ↗
Checked Aug 31, 2026 · Catalog record dated 2026-08-31: exact MPN, new condition, seller status retailer, availability listed. No historical price adopted for this URL. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.
- [5] Amazon: HAT5310-20T historical US listing ↗
Checked Aug 31, 2026 · Catalog record dated 2026-08-31: exact MPN, new condition, seller status marketplace-unverified, availability listed. No historical price adopted for this URL. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.
- [6] Best Buy: HAT5310-20T historical US listing ↗
Checked Aug 31, 2026 · Catalog record dated 2026-08-31: exact MPN, new condition, seller status marketplace-unverified, availability listed. No historical price adopted for this URL. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.
- [8] Newegg — HAT5310-20T sold by Adorama ↗
Checked Sep 11, 2026 · Primary item price $1,149.99; sold-by Adorama; new-condition and stock fields. Shipping $9.10; final before tax $1,159.09.
- [9] B&H product price observation ↗
Checked Sep 27, 2026 · Captured observation; sha256:13e76d3d7146a19bae42b03a6ed2aea6501f3c2788c3c82a0d6813fda77b7edd
- [10] Adorama product price observation ↗
Checked Sep 27, 2026 · Captured observation; sha256:b975a86313039b6ddbbfd28e88856408e87c0712fe2f3f3d5533721f891236d6
- [11] Best Buy product price observation ↗
Checked Sep 27, 2026 · Captured observation; sha256:db8cc29667eda8789fac6232a72bfaae6814de9a79e65140b4661541020660b9
- [12] Newegg product price observation ↗
Checked Oct 9, 2026 · newegg-main-item; sha256:2d09e46aa9dfc5d5d577b643630530390c96b46d97d6312a1a35c6ffa8902550
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 identity and official specification/revision boundaries, original related-source applicability, dated merchant qualification and reader consistency; explicit missing evidence remains partial. Existing noindex decision preserved.
- 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)