Cheapest Hard Drives per Terabyte (2026)
If your only goal is the lowest possible cost per terabyte, this page is for you. I track every HDD listing on Amazon.com and rank them by price per TB. Nothing else. Whether you are filling a JBOD, building a cold-storage archive, or just want the most gigabytes for your budget, these are the drives that deliver the most storage for the least money right now.
How cheap can you go?
Do not assume the biggest drive is the cheapest per terabyte. It usually beats a stack of small drives, but the curve is not a straight line: through the 2026 shortage the very largest drives have often been poor value per TB, and mid-capacity models have repeatedly undercut them. Read the live ranking rather than reaching for the highest number on the shelf. Refurbished enterprise pulls sit below new drives again, and below those sit SAS drives, which need a host bus adapter and will not plug into a normal motherboard. Those cards are marked, because the cheapest drive on this page is no use to you if you cannot connect it. I am deliberately not putting a target figure here: prices moved a long way through 2026 and any number I typed would be wrong within weeks. The live table below is the number.
Quick Verdict
- Who this is for
- Budget-conscious buyers, homelab builders, data hoarders, and anyone who needs maximum raw storage at the absolute lowest price per terabyte.
- What usually wins
- Whatever tops the live per-TB ranking today, not a fixed capacity. In the 2026 crunch that is often a mid-capacity drive rather than the very largest, so trust the table over a rule of thumb. Refurbished enterprise drives sit lowest of all on cost per terabyte if you can tolerate shorter warranties.
- Prioritise
- Price per TB, the single metric this page optimises for. Everything else (brand, speed, warranty length) is secondary when raw cost-per-gigabyte is the goal.
Prices updated daily from Amazon.com. All links go directly to the retailer. Details.
Bottom line: the lowest price-per-TB pick on this page right now is the HP 3.5-Inch 4000 GB Hot-Swap 2 MB Cache Internal Hard Drive 693687-B21, 4 TB new, at $95.18 ($23.80/TB) on Amazon.com. Check the current price.
Cheapest New HDDs per Terabyte
Brand-new hard drives with the lowest cost per TB available right now. Full manufacturer warranty included.
HP 3.5-Inch 4000 GB Hot-Swap 2 MB Cache Internal Hard Drive 693687-B21
HGST Ultrastar He 3.5-inch 6000GB 64MB Cache 7200RPM SATA Ultra 512n Helium Platform Enterprise HDD HUS726060ALA640
MDD MAXDIGITALDATA 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5'' Internal Hard Drive (for NAS, Network Storage) - 5 Years Warranty
HGST Ultrastar He8 Helium 6TB 3.5-Inch 7200RPM SATA ULTRA 512e SE 128MB Cache Internal Bare or OEM Hard Drive - HUH728060ALE604 / 0F23669
HGST Ultrastar He6 6TB 3.5" SATA 7200 RPM Enterprise Internal Hard Drive with 64Mb Cache - HUS726060ALA640/ 0F18335 64 MB Cache 3.5-Inch Internal Bare or OEM Drives 0F18335
HGST Ultrastar He12 | HUH721212ALE601 | 0F27454 | 12TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" Cache | 512E | BitLocker Hard Drive Encryption | Power Disable Function |
Seagate ST6000NM0024 6TB 7.2K SATA 3.5" HDD
Hitachi 0F23001 6TB 7.2K 3.5" SATA 6Gbps HDD
MDD MAXDIGITALDATA 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Hard Drive for Surveillance Storage (MD12TBGSA25672DVR) - 3 Years Warranty
MDD 12TB 7200RPM SATA 6Gb/s 256MB Cache 3.5inch Internal Desktop Hard Drive, MD12TBGSA25672
Cheapest High-Capacity Drives (12 TB+)
The price-per-TB sweet spot. Large-capacity drives where the per-terabyte cost is at its lowest.
MDD MAXDIGITALDATA 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5'' Internal Hard Drive (for NAS, Network Storage) - 5 Years Warranty
HGST Ultrastar He12 | HUH721212ALE601 | 0F27454 | 12TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" Cache | 512E | BitLocker Hard Drive Encryption | Power Disable Function |
MDD 12TB 7200RPM SATA 6Gb/s 256MB Cache 3.5inch Internal Desktop Hard Drive, MD12TBGSA25672
MDD MAXDIGITALDATA 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5-inch Internal Hard Drive for Surveillance Storage (MD12TBGSA25672DVR) - 3 Years Warranty
X16 12TB 3.5" Hard Drive ST12000NM009G 7.2K 2MT233-150 7KT9W
T2YHT 0T2YHT 12TB 7.2K 6Gb/s SATA 3.5" Hard Drive HUH721212ALE600
TOSHIBA N300 Internal Hard Drive 22 Tb 7200 RPM 512 Mb 3.5", W129161818 (Tb 7200 RPM 512 Mb 3.5 Serial Ata Iii)
HP P09165-B21 Midline Helium - Hard Drive - 14 TB - Hot-Swap - 3.5 Inch Lff - SATA 6GB/S - 7200 RPM - with Low Profile Carrier
Water Panther 18TB 7200 RPM SATA 6Gb/s 3.5" HDD for Dell PowerEdge Servers | Enterprise Hard Drive in 14G Tray | Compatible with PER340 PER440 PER640 PER740
Water Panther 18TB 7200 RPM SATA 6Gb/s 3.5" HDD for Dell PowerEdge Servers | Enterprise Hard Drive in 13G Tray | Compatible with T440 T630 T640 R630 R720 R720xd R730xd R730
Cheapest Refurbished HDDs per Terabyte
Recertified enterprise pulls and used drives at rock-bottom per-TB pricing. Best for bulk storage where brand-new warranty is not essential.
HUS726040ALS210 HGST 4TB 7.2K 12G LFF SAS Hard Drive
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
0529fg-del Dell Constellation Es.3 0529fg 529fg 4tb 7.2k 3.5 Sas Hard
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
MDD MAXDIGITALDATA 4TB 7200RPM 128MB Cache SAS 12Gb/s 3.5inch Internal Enterprise Hard Drive (MD4TSAS12872E) - [ Not a SATA HDD ] (Renewed)
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Pulled 529FG ST4000NM0023 4TB 3.5 7.2K 6Gb SAS Hard Drive
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
HP 695842-001 4TB SAS Hard Drive Disk (HDD) - 7,200 RPM, 3.5-inch form factor, SmartDrive Carier (SC), Midline (MDL), 6Gb per second Transfer Rate (TR)
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Western Digital Re 4TB SAS Datacenter Capacity Hard Drive 3.5 inch 7200 RPM 32MB Cache | WD4001FYYG |
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Seagate 4TB Enterprise Capacity SAS 12Gb s 512n 3.5" Internal Hard Drive Model ST4000NM0025
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Seagate Enterprise Capacity 3.5 HDD (Constellation ES) 4TB 7200RPM
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
Seagate ST6000NM0034 6TB 3.5-inch SAS 7.2K RPM 128MB HDD (Renewed)
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
HKRVPXD EXOS 7E8 SAS HDD ST8000NM0075 8TB 7.2K 7200Rpm 256MB 12Gbps Enterprise Capacity 3.5 HDD Hard Drive for Server
SAS interface. Needs a host bus adapter, it will not plug into a normal motherboard.
HDDHunt Price-Index — September 2026
Updated monthlyA dated snapshot of the cheapest cost per terabyte at each capacity, drawn from 829+ new-HDD listings on Amazon.com (US). Free to cite with attribution — the live tables above always carry today's numbers.
The cheapest new internal hard drive on Amazon US runs roughly $23–$38 per terabyte, and cost per terabyte barely tracks capacity: in this snapshot 14TB leads at $22.79/TB while 16TB is the priciest at $38.02/TB, with the tiers in between clustered close together. There is no fixed "cheapest capacity": which drive wins on cost per TB shifts daily with stock and lightning deals, so the best per-TB buy is whatever tops the live ranking on the day, not a number you saw last month.
A 40% gap between the cheapest and priciest per-TB deals across capacities — which capacity wins shifts with the deals, so read the live ranking rather than assuming the biggest drive is cheapest.
| Capacity | Cheapest $/TB |
|---|---|
| 4TB | $23.80 |
| 6TB | $26.00 |
| 8TB | $30.00 |
| 10TB | $30.30 |
| 12TB | $27.50 |
| 14TB cheapest deal | $22.79 |
| 16TB priciest deal | $38.02 |
| 18TB | $32.72 |
| 20TB | $31.00 |
| 22TB | $31.58 |
| 24TB | $33.33 |
Method: cheapest single new, internal 3.5" SATA HDD by $/TB per capacity tier on Amazon.com (US) (refurbished, SAS server pulls and USB externals excluded from the headline curve). Point-in-time floor as of 2026-09-22; thin tiers can be moved by a single deal. The live ranking above is the source of truth.
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HDDHunt Price-Index (September 2026): the cheapest new internal hard drive on Amazon US runs roughly $23–$38 per terabyte, and cost per terabyte barely tracks capacity — in this September 2026 snapshot 14TB leads at $22.79/TB and 16TB is dearest at $38.02/TB — so the best value per terabyte is whichever drive tops the live ranking rather than a fixed capacity. Source: HDDHunt, https://hddhunt.com/cheapest-hdd-per-tb/
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How to Choose
Getting the lowest price per TB is straightforward if you follow a few rules.
Bigger usually beats tiny, but check the curve
Small drives are almost always the worst value per TB, so avoid filling a bay with 2–4 TB drives if you can help it. But do not assume the largest drive wins either: through the 2026 shortage the very biggest capacities have often been poor value per TB while mid-capacity drives undercut them. Read the live table above rather than reaching for the highest number.
Consider refurbished
Datacenter pulls from Seagate Exos and WD Ultrastar lines are often 30–50% cheaper per TB than new retail drives. They have been tested and many sellers include 1–2 year warranties.
Watch the price move
The same drive can swing 20% in a week as stock and lightning deals come and go. Prices here are refreshed daily, so check before you buy rather than trusting a number you saw last week.
CMR vs SMR
SMR drives are sometimes a few dollars cheaper per TB but can be painfully slow for random writes and RAID rebuilds. For bulk sequential storage (backups, archives), SMR is fine. For NAS or multi-use, stick to CMR.
Frequently Asked Questions
What is the cheapest hard drive per terabyte right now?
There is no fixed answer — the floor moves week to week as deals and stock come and go, which is why the table on this page is refreshed daily and ranks every Amazon US listing by price per terabyte. What is stable is the method: sort by $/TB, ignore the sticker price, and check the live ranking rather than trusting a number you saw last month. Through the 2026 shortage the cheapest tier has bounced between mid-capacity new drives and refurbished enterprise pulls, so read the table on the day you buy.
Is a bigger drive always cheaper per terabyte?
Broadly yes, but with two caveats. Across the typical drive, cost per terabyte falls steeply from the small 1–4 TB capacities down to about 14–18 TB, then flattens — past roughly 16 TB you pay much the same per terabyte whatever the size, so the very largest drive is not automatically the cheapest per TB. Second, the single cheapest deal at each capacity bounces week to week with stock and lightning deals, so on any given day a mid-capacity model can top the per-TB ranking. The reliable rule: skip the tiny 1–4 TB drives, then let the live curve above pick the winner rather than reaching for the highest number on the shelf.
Are refurbished drives cheaper per terabyte than new ones?
Usually yes. Refurbished datacenter pulls (Seagate Exos, WD Ultrastar) typically sit below new retail on cost per terabyte, and SAS pulls sit lower still. The trade-off is a shorter seller warranty and unknown usage history. Note that Amazon’s "Refurbished" label is not always the bargain the word implies — at some capacities it is dearer per TB than a plain used listing. Check the used and refurbished rows, not just the label.
Why is a SAS drive so much cheaper than the SATA drives?
SAS drives use a server interface that will not plug into a normal motherboard — they need a host bus adapter (HBA). That is why they are often the cheapest listings by $/TB and why we mark them: the cheapest drive on this page is no use to you if you cannot connect it. Only buy SAS if you already have an HBA and a spare port, or you budget for one.
What is SMR and should I avoid it for cheap storage?
SMR (shingled) drives overlap data tracks to cut cost, so they are sometimes a few dollars cheaper per TB, but random writes and RAID rebuilds can be painfully slow. For bulk sequential storage — backups, cold archives, a Plex library you mostly read — SMR is fine. For a NAS array or anything write-heavy, stick to CMR.
How often do these prices change?
The table is refreshed daily from live Amazon US listings. The same drive can swing 20% in a week as stock and lightning deals come and go, so a $/TB figure is only accurate on the day you read it. That is why this page deliberately avoids quoting a fixed "target" price — check the live table before you buy.
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