I get asked this question more than any other: “What’s the cheapest hard drive per TB right now?” Fair enough. It’s literally why I built HDDHunt. But the answer changes constantly (especially with HDD prices rising in 2026), so let me walk you through what’s cheapest today, what’s consistently cheap, and how to never overpay.

Updated August 2026. I wrote this in April, and the market has moved hard against buyers since — the 2026 HDD shortage has pushed prices up across every capacity. The sub-$14/TB numbers this article originally quoted are gone: as of my latest price-index snapshot, the cheapest new internal drive on Amazon US is $23.80/TB at 4TB and $35.69/TB at 16TB, with nothing new under ~$24/TB. Two things flipped from the April version: bigger is not automatically cheaper per TB anymore (4TB is currently the value leader), and the old “$200 buys a 16TB drive” math no longer holds. I’ve corrected the specific figures below and flagged the April numbers as historical. The method — sort by price per TB, buy enterprise for the warranty, time the sales — still holds; the numbers don’t. Always check the live $/TB ranking before you buy.

The Current Champions

I pull prices from Amazon.com every day. Here are the enterprise families that consistently rank near the top of the price-per-TB list. Which exact capacity wins moves week to week — check the live ranking for today’s order:

Amazon US: Cheapest New Drives

These enterprise families reliably compete for the best per-TB value. In August 2026 the low $/TB figures cluster around 14TB (~$25/TB) and 4TB (~$24/TB) rather than the mid-high range that led in April:

Seagate Exos X16 16TB: Still one of the go-to enterprise picks — CMR, 5-year warranty, and the drive I point most people to for reliability. On price per TB, though, note it has re-rated: it ran under $12/TB back in April, and as of August the cheapest 16TB is ~$35.69/TB, one of the pricier bands right now. Check the live $/TB before assuming 16TB is your cheapest option.
WD Ultrastar DC HC550 16-18TB: Neck and neck with the Exos. Sometimes cheaper, sometimes not. It literally changes day to day. Both are excellent.
Seagate Exos X18 18TB: When it’s in stock and priced right, the 18TB hits amazing per-TB numbers. The per-unit price is higher, but you’re getting more TB per drive bay.
Toshiba MG Series 14-16TB: Often overlooked because Toshiba doesn’t have the brand recognition of Seagate or WD in the consumer space. But these are solid enterprise drives. The MG08 and MG09 series show up at competitive prices regularly.

For live numbers, head to the best HDD deals page. It’s sorted by price per TB and updates daily.

Amazon US: Cheapest Refurbished Drives

If you’re comfortable with refurbished, the per-TB prices drop significantly:

Refurbished enterprise pulls in the 10-14TB range used to hit $6-9/TB (that’s the April figure). Refurb still undercuts new, but it has risen alongside everything else in the shortage — I don’t track refurbished in the price-index (too much seller variance), so treat it as “cheaper than new, but check the actual listing” rather than a fixed number. These are drives pulled from data centers after 3-5 years of service, tested, and resold with a seller warranty (typically 1-2 years, sometimes 90 days).

Are they worth it? Depends on your risk tolerance:

For a NAS with RAID/parity: Absolutely. If one drive dies, you swap it and rebuild. At roughly half the per-TB cost of new, the savings fund your replacement drive.
For a single drive with no backup: Risky. A refurbished drive has already lived a life. It might last another 5 years, or it might last 5 months.

Mixing new and refurbished across an array is a reasonable strategy. The math works out in your favor over time, especially with RAIDZ2 absorbing the higher failure risk on the refurbished units.

Why Mid-High Capacity Is Usually the Sweet Spot

August 2026 caveat: in a normal market the argument below holds and the 14-18TB range wins on $/TB. The 2026 shortage has flattened and partly inverted that curve — in my latest price-index, 4TB ($23.80/TB) and 14TB ($24.99/TB) are actually cheaper per TB than 16TB ($35.69/TB). The structural economics still explain the long-run shape; they don’t predict this month’s floor. Sort by live $/TB rather than assuming a band.

This isn’t random. There’s a reason mid-high capacity drives usually offer the best per-TB value:

Manufacturing economics: Drive manufacturers invest heavily in their highest-capacity platforms. The 14-18TB range represents the current “mature” node, the production lines are fully ramped, yields are high, and competition between Seagate, WD, and Toshiba is fierce. That competition drives prices down.

Channel dynamics: Enterprise customers (cloud providers, data centers) buy 14-18TB drives in massive volumes. The consumer retail market gets the overflow and pricing benefits from those economies of scale.

The top-end premium: 20TB+ drives are still at the bleeding edge. Lower yields, less competition, higher prices per TB. Give it another year and those will become the sweet spot.

The bottom-end penalty: 4-8TB drives cost almost as much to manufacture as larger drives (same motor, same PCB, same packaging) but hold less data. You’re paying a floor price for the drive mechanism, regardless of how much data it stores.

The Capacity Trap: Why Cheap Small Drives Are Actually Expensive

In a normal market this is the most common mistake I see: someone needs 8TB, buys two small drives because each looks cheap, and pays more per TB than one bigger drive would have cost. Back in April a single 16TB Exos at ~$180 was $11.25/TB, versus ~$17.50/TB for a pair of 4TB drives — bigger won easily, on one drive bay instead of two.

August 2026 update — this one has flipped, and it’s the clearest sign of how odd the shortage is. At today’s floor a 16TB runs ~$35.69/TB while 4TB is the cheapest band at ~$23.80/TB, so buying up isn’t automatically cheaper per TB right now. The bay-count and power arguments for fewer, larger drives still stand — but the pure $/TB math no longer favours the big drive by default. Don’t assume: check the live $/TB ranking for the capacity you actually need.

The durable lesson is the same either way: never buy on sticker price. On HDDHunt, I sort by price per TB exactly for this reason — the best value floats to the top, regardless of total price or capacity.

External Drives: The Shucking Angle

External USB hard drives sometimes offer better per-TB pricing than internal drives because manufacturers subsidize them to move units. The r/DataHoarder community calls the practice of removing the internal drive from an external enclosure “shucking.”

The pros:

Sometimes 10-20% cheaper per TB than buying the bare internal drive
Inside you typically find a standard 3.5” drive (WD White Label, which is often a relabeled Red or Ultrastar)

The cons:

Voids the external warranty
You don’t know exactly which internal drive model you’ll get
Some drives have a 3.3V pin issue that requires a Kapton tape mod for certain PSUs

I don’t track internal-vs-external drive model matching on HDDHunt (there’s too much variance), but I do track external hard drive deals by price per TB. If you see an external beating the internal price, it might be worth shucking.

How to Actually Get the Best Price

Knowing what’s cheapest right now is step one. Here’s how to consistently buy at the best prices:

1. Track Prices Over Time

Drive prices fluctuate weekly. A drive that’s, say, $30/TB today might be $28/TB next week during a lightning deal, or $34/TB if stock gets low. Watching the trend helps you know whether today’s price is genuinely good or just average.

I’m building price history tracking into HDDHunt. It’s coming soon. In the meantime, the deals page updates daily so you can catch the swings as they happen.

2. Watch for Prime Day and Holiday Sales

Amazon’s major sale events consistently deliver the best storage prices of the year:

Prime Day (July-ish): 15-25% discounts on popular drive models
Black Friday / Cyber Monday: The single best time to buy drives. I’ve seen 30%+ discounts.
Back-to-school sales (August): Smaller discounts but still worth watching

Plan your major storage purchases around these events if you can wait.

3. Don’t Ignore Marketplace Sellers

Amazon Marketplace sellers (not just Amazon directly) sometimes list drives significantly cheaper. This is especially true for refurbished and “renewed” enterprise drives. Just check the seller ratings and return policy.

4. Check the Same Drive Across Sellers

The identical model often appears from several sellers at meaningfully different prices, especially on enterprise drives. Sort by price per TB rather than sticker price and the gap becomes obvious.

Use HDDHunt to compare every Amazon.com listing side by side, ranked by $/TB.

5. Buy More at Once

Not because of bulk discounts (Amazon rarely offers those), but because shipping is free over a certain threshold and you amortize the time cost of comparison shopping. If you’re building a 4-drive NAS, buy all four drives when pricing is good rather than one at a time.

What I’d Buy Today With $200, $500, and $1,000

Here’s what I’d do at three budget levels, optimizing purely for price per TB. These are August 2026 numbers — a year ago each of these budgets bought roughly 2-3x the capacity, which tells you everything about the shortage. The per-drive prices below assume today’s ~$25-36/TB floor; verify on the live $/TB ranking before you commit.

$200 Budget

At today’s floor, $200 no longer buys a new 16TB drive (the cheapest 16TB is ~$570). Best value for the money is the low end of the curve: two 4TB drives (currently the per-TB value leader at ~$24/TB, ~$95 each) for 8TB, or a single mid-size drive. If you want more raw capacity for the same money and can accept shorter warranties, refurbished enterprise pulls stretch a $200 budget furthest — just buy them for a parity array, not a lone drive.

$500 Budget

$500 comfortably covers one 14TB new enterprise drive (~~$350 at today’s ~~$25/TB floor) with room to spare, or gets you within reach of a single 16-18TB Exos/Ultrastar (~~$550-570) if you catch a sale. For a starter array, two 14TB drives (~~$700) is the next step up once budget allows. Sort by $/TB on the deals page — the ranking moves week to week.

This is the practical entry point for most home users who want a proper NAS setup without overpaying into the 16TB band.

$1,000 Budget

$1,000 buys two large enterprise drives today — e.g. a pair of 16-18TB (~$1,100 at the current floor, so wait for a sale) or a 24TB + a 14TB for ~38TB raw around this budget. In RAIDZ1 that’s a solid, expandable home array. The six-drive, 100TB-raw builds this article originally described at this budget now cost closer to $3,000 — a direct measure of how far prices have moved.

Check the enterprise HDD page for current large-capacity pricing before you buy.

The Tools I Use

Obviously, HDDHunt is my go-to. I literally built it for this. Everything is sorted by price per TB and updated daily from Amazon.com.

Beyond that:

CamelCamelCamel for Amazon price history on specific ASINs
r/DataHoarder for community deal-spotting and drive reviews
r/buildapcsales for flash deals that might not hit my tracker yet

But honestly, I built HDDHunt because I got tired of checking all those places manually. The deals page is my first stop, and it should be yours too.

Bottom Line

As of August 2026, after the shortage, new enterprise drives sit around $24-36/TB — the cheapest bands are currently 4TB (~~$24/TB) and 14TB (~~$25/TB), not the mid-high range that led in April, and refurbished still undercuts new but has risen too. The sub-$14/TB era this article originally described is over. Whichever capacity you choose, go enterprise for the better warranty and reliability.

Don’t assume the biggest drive is cheapest per TB — in this market it often isn’t, so check HDDHunt first. Don’t buy the first drive you see. And don’t forget that the best price today won’t be the best price next month — always confirm against the live $/TB ranking.

For the deeper reasoning, read why price per TB is the only metric that matters and my breakdown of how much 1TB actually costs in 2026.

I update prices daily. Bookmark the best HDD deals page, check back when you’re ready to buy, and let the math do the work.

Cheapest Storage Per TB on Amazon (Updated August 2026)