20TB Hard Drive Deals – Prime Big Deal Days 2026
20TB Hard Drive listings on Amazon.ca, each row judged against its own price history
Prime Big Deal Days has ended, here is what is still at its low.
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The lowest CA$43.40/TB here today is the Seagate Skyhawk Ai 3.5 Serial Ata at CA$868.00, listed as new. Verdict: real low. Our lowest recorded price for it is CA$868.00 on 2026-10-16.
New
Renewed and refurbished
Ranked separately from new stock. The warranty on these comes from the seller named in each row, not from the manufacturer.
| Product | Capacity | Price | Was | CA$ / TB | Verdict | 90 days | Prime | Seller | Buy | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Western Digital Ultrastar DC HC560 WUH722020BLE601 0F38781 20TB 7200 RPM SATA 6Gb/s 512e 512MB Cache Power Disable 3.5in Enterprise Hard Drive (Renewed)RenewedHDD · SATA | 20 TB | CA$1,027.67 | - | CA$51.38 | Real low | - | ServerPartDeals | Buy on Amazon | |||||||||||||||||||||||||||||||||||||||||
| Seagate Exos X20 ST20000NM007D 20TB 7.2K RPM SATA 6Gb/s 3.5in Hard Drive (Renewed)RenewedHDD · SATA | 20 TB | CA$1,246.95 | - | CA$62.35 | Real low | - | Redefine IT | Buy on Amazon | |||||||||||||||||||||||||||||||||||||||||
| Seagate Exos X20 20TB Enterprise HDD - CMR 3.5 Inch Hyperscale SATA 6Gb/s, 7200 RPM, 512e and 4Kn FastFormat, Low Latency with Enhanced Caching - ST20000NM007D (Renewed)RenewedHDD · SATA | 20 TB | CA$1,371.65 | - | CA$68.58 | Near its low | - | Redefine IT | Buy on Amazon | |||||||||||||||||||||||||||||||||||||||||
Prices we checked and would not pay (3)
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Used
(1)
Used listings carry no retest and usually no warranty. They are never counted toward whether this page is worth indexing.
| Product | Capacity | Price | Was | CA$ / TB | Verdict | 90 days | Prime | Seller | Buy |
|---|---|---|---|---|---|---|---|---|---|
| WD 20TB Elements Desktop External Hard Drive, USB 3.0 external hard drive for plug-and-play storage - WDBWLG0200HBK-NESNUsedHDD · USB | 20 TB | CA$999.99 | - | CA$50.00 | Real low | - | G_Electronics | Buy on Amazon |
Is it really a deal?
The cheapest 20TB route is an enclosure you have to open, and that trade is a warranty decision rather than a price one. The table shows both routes side by side so the gap is explicit.
For the cheapest row on this page we have recorded a low of CA$868.00 on 2026-10-16, across 8 days of our own checks.
2026 is a shortage year for both hard-drive platters and NAND, and several list prices were raised earlier in the year before being discounted during this event. A percentage off a raised list price is not the same as a low, which is why every row here is compared against what we recorded for that exact item instead.
The cheapest new 20 TB listing today works out at CA$43.40/TB.
Renewed and recertified stock at 20 TB starts at CA$51.38/TB, with the seller rather than the manufacturer behind the warranty.
The cheapest external route to 20 TB is CA$44.25/TB, which you would have to open the enclosure to use as a bare drive.
What the verdicts mean
- Real low
- At or below the lowest price we have recorded for this item.
- Near its low
- Within three percent of the lowest price we have recorded.
- List-price cut
- Cut against Amazon's own reference price, but still above the lowest price we have recorded.
- Not a deal
- Above our 30-day median for this item.
- No history yet
- We have fewer than seven days of our own price checks for this item.
At 20TB the external desktop unit wins outright, and by enough that it changes how you should shop the tier. WD's Elements Desktop and Seagate's Expansion Desktop at this size price well below the bare WD Red Pro and Exos X20 drives that serve the same purpose, which is the sharpest illustration of the 2026 inversion anywhere on the site. If the drive is going into a NAS the question becomes whether you are willing to open an enclosure and give up its warranty in exchange for the lower cost per terabyte.
Frequently asked questions
Why is a 20TB external so much cheaper than a 20TB internal?
Finished external products were priced on earlier cost bases while bare retail internals absorbed the 2026 supply squeeze. The enclosure, power supply and cable now cost less than the markup on the bare drive.
Is shucking a 20TB external worth it?
It is the cheapest path to the capacity, and it ends the enclosure warranty the moment the case is open. Our shuckable page lists which families open cleanly and which use a hardware-encryption bridge that ties the drive to its board.
WD Red Pro or Exos X20 for a NAS?
The Red Pro is quieter and sold for small arrays with a five-year warranty; the X20 is a data-centre drive with higher workload ratings and more noise. Both are conventional recording, so either rebuilds predictably.
Is 20TB the best value capacity right now?
On the external route it is among the strongest tiers in 2026. Compare it against 22TB and 24TB on their own pages, because the cost-per-terabyte curve stays flat through that band rather than rising.
Last updated: 2026-10-31 06:02:04 UTC. As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date indicated on Amazon.ca and are subject to change. Any price displayed at the time of purchase will apply. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED AS IS AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.