HGST Ultrastar 12TB searches often lead to He12 drives later identified as WD Ultrastar DC HC520. Compare true 12TB models, their interfaces and renewal conditions before choosing between the seller listings.
The He12 / DC HC520 is the primary 12TB target. Verify HUH721212, the SATA or SAS suffix, seller condition and final checkout price before treating an offer as suitable.
See current HDD listings ↓Current HGST Ultrastar 12TB Deals on Amazon 8
Only positively identified Ultrastar-family hard drives qualify. Compare true capacity, model number, seller condition and price per TB. Verified Amazon prices may change.
Potential percentage savings appear only when a fresh Amazon listing includes an independently identified reference price for the same ASIN. If Amazon does not provide a suitable reference price, we show no discount badge.
HGST - WD Ultrastar DC HC520 HDD | HUH721212ALE601 | 12TB 7200RPM SATA 6Gb/s 256MB Cache 3.5-Inch | ISE 512e | Helium Data Center Internal Hard Disk Drive (Renewed)
12TB · 3.5-inch SATA · $28.29/TB
Condition: Refurbished / renewed · Confirm seller warranty and interface.
HGST WD Ultrastar DC HC520 HUH721212AL4200 12TB HDD 7200 RPM SAS 12Gb/s Interface 4Kn ISE 3.5-Inch Helium Data Center Enterprise Internal Hard Disk Drive, Model: 0F29560
12TB · 3.5-inch SAS · $36.81/TB
Condition: Not stated · Confirm seller warranty and interface.
HGST 12TB Ultrastar DC HC520 SATA 6Gb/s 7200RPM 3.5-inch 256MB Cache HUH721212ALE604 0F29592, with Power Disable Feature (Renewed)
12TB · 3.5-inch SATA · $28.33/TB
Condition: Refurbished / renewed · Confirm seller warranty and interface.![HGST Ultrastar He12 HUH721212AL4201 12 TB Hard Drive - SAS [12Gb/s SAS] - 3.5 Drive - Internal](https://m.media-amazon.com/images/I/31wp8d2WKKL._SL160_.jpg)
HGST Ultrastar He12 HUH721212AL4201 12 TB Hard Drive - SAS [12Gb/s SAS] - 3.5 Drive - Internal
12TB · 3.5-inch SAS · $47.87/TB
Condition: Not stated · Confirm seller warranty and interface.
HGST WD Ultrastar DC HC520 12TB HDD 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive | Power-Disable | HUH721212ALE604 0F29592 (Renewed)
12TB · 3.5-inch SATA · $29.17/TB
Condition: Refurbished / renewed · Confirm seller warranty and interface.
HGST 12TB HDD 7.2K RPM 3.5" 12Gb/s SAS Hard Disk Drive Model: HUH721212AL5200 DP/N: 9HXK6
12TB · 3.5-inch SAS · $49.58/TB
Condition: Not stated · Confirm seller warranty and interface.
HGST Ultrastar He12 | HUH721212ALE601 | 0F27454 | 12TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" Cache | 512E | BitLocker Hard Drive Encryption | Power Disable Function |
12TB · 3.5-inch SATA · $29.17/TB
Condition: Not stated · Confirm seller warranty and interface.
HGST WD Ultrastar DC HC520 12TB SATA 6Gb/s 3.5-Inch Data Center Hard Drive - HUH721212ALE600 (Renewed)
12TB · 3.5-inch SATA · $29.17/TB
Condition: Refurbished / renewed · Confirm seller warranty and interface.Other enterprise HDDs to compare 4
Compare capacity-matched enterprise HDD alternatives from WD Gold, Seagate Exos and Toshiba. These are not guaranteed drop-in replacements.
![Seagate-IMSourcing Exos X16 ST12000NM003G 12 TB Hard Drive - Internal - SATA [SATA/600]](https://m.media-amazon.com/images/I/41CHqHDuOuS._SL160_.jpg)
Seagate-IMSourcing Exos X16 ST12000NM003G 12 TB Hard Drive - Internal - SATA [SATA/600]
12TB · 3.5-inch SATA · $40.79/TB
Condition: Not stated · Confirm seller warranty and interface.
Western Digital 12TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD122KRYZ
12TB · 3.5-inch SATA · $49.58/TB
Condition: Not stated · Confirm seller warranty and interface.
Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
12TB · 3.5-inch SATA · $44.67/TB
Condition: Not stated · Confirm seller warranty and interface.
Seagate Exos X18 ST12000NM001J 12 TB Hard Drive - Internal - SATA (SATA/600) - Conventional Magnetic Recording (CMR) Method - Storage System, Video Surveillance System Device Supported - 7200rpm - 270
12TB · 3.5-inch SATA · $52.87/TB
Condition: Not stated · Confirm seller warranty and interface.Amazon prices may change between verification and checkout. A retained last-verified price is not a fresh offer; an alternative is not guaranteed compatible with the HGST drive.
Why this advice makes sense
Compare real buying choices
| Choice | Best use | Check before buying |
|---|---|---|
| Exact family model | Replace a specified HGST disk | Match the full part number, interface and sector format |
| Refurbished offer | Lower initial cost when acceptable | Verify condition, power-on data, returns and seller warranty |
| Other enterprise HDD | Compare total cost for your capacity | Confirm controller/NAS fit and avoid assumed drop-in compatibility |
Comparing price per TB
Use the same currency and actual capacity, and confirm drive condition before purchasing.
Compatibility, seller condition and warranty also matter.
HGST Ultrastar buying details for 12TB drives
Practical details that matter when comparing exact HDDs, capacities and configurations.
He12 / HC520 naming
Western Digital expressly identifies the DC HC520 as previously known as Ultrastar He12. Its family used helium-filled technology and SATA/SAS options, but not every 12TB Ultrastar-related search hit will be the same variant.
Compare the full HUH721212 part number and verify the interface against your server, NAS, or workstation specifications.
12TB relative to 10TB
A 12TB disk adds nominal capacity, but the best-value upgrade depends on total price, price per TB, usable capacity and migration requirements. A cheap 10TB renewed drive may still be the better purchase for a smaller backup pool.
Compare like-for-like drive condition and warranty. Do not infer any historical-low discount unless the actual Amazon listing provides a defensible reference price.
RAID rebuild requirements
Before replacing a 10TB disk with 12TB, check whether the array will expose additional space immediately or only after all member drives are upgraded. RAID layouts differ, so capacity growth depends on software and geometry.
Sector size, firmware rules and time required for a rebuild should be part of a purchasing decision, not an afterthought.
What happens if listings are limited?
An older Ultrastar model may have only a few legitimate offers on Amazon at any given time. Rather than display unrelated drives as exact matches, we keep the listing count honest and offer a manufacturer-model search as a separate action.
If no good exact replacement exists, evaluate an approved substitute and confirm its interface, sector format and condition before committing.
How we evaluate an offer
The price cards prioritize a correct part-number family, matching capacity and verifiable interface. Only offers returned by the site’s configured Amazon catalogue can show a verified price, and last-verified observations keep their original age.
We do not manufacture discounts, claim a laboratory test, or present used stock as new. An Amazon offer can change between verification and checkout.
More CloudZat enterprise HDD research
Existing Ultrastar and enterprise HDD guides stay in place and are linked for context.
Frequently asked questions
Is HGST Ultrastar the same as WD Ultrastar?
They are connected through Western Digital ownership and the continuation of the Ultrastar enterprise drive line. Check the exact generation and model code; the branding alone does not prove technical identity.
Can a SAS Ultrastar drive be used in a SATA-only NAS?
Usually not. SAS requires appropriate SAS-capable hardware, so check the appliance specifications and the full drive suffix before purchasing.
Is a refurbished HGST Ultrastar safe for important data?
A refurbished drive can be usable, but no single disk should be the only copy of important data. Review seller testing, return rights, SMART health and backups.
Does price per TB tell me which Ultrastar to buy?
Price per TB helps compare capacity cost, but interface, condition, formatted capacity, warranty and system fit are equally important.
Specifications and references
Manufacturer information is linked for configuration checks. CloudZat has not independently benchmarked these drives.
CloudZat may earn a commission from qualifying Amazon purchases. Prices and availability can change. Product recommendations are based on model identity, capacity, fit, and documented observations, not a claimed personal hardware test.