20TB Hard Drives
9 drives in stock, from $36.00/TB (Seagate IronWolf Pro 20TB), with a typical price of $45.00/TB. Prices from several retailers, updated daily. Sorted by value; sort by price per TB to see the cheapest space.
Every drive here is a 20TB internal hard drive. Sizes sold as 20TB are grouped together whatever the exact figure on the box.
| Drive | Capacity | Speedspindle | Recording | WorkloadTB/year | Value↓for the price | From | Buy | ||
|---|---|---|---|---|---|---|---|---|---|
| Seagate IronWolf Pro 3.5" | 20TB | 7,200 | CMR | 550 | 96.584/100 | $36.00 | $720 |  | |
| WD Red Pro 3.5" | 20TB | 7,200 | CMR | 550 | 91.785/100 | $40.83 | $817 | | |
| Seagate SkyHawk AI 3.5" | 20TB | 7,200 | CMR | 550 | 85.484/100 | $46.00 | $920 |  | |
| Toshiba X300 Pro 3.5" | 20TB | 7,200 | CMR | 300 | 80.178/100 | $45.00 | $900 | | |
| Toshiba N300 Pro 3.5" | 20TB | 7,200 | CMR | 300 | 78.178/100 | $47.43 | $949 | | |
| Seagate Exos X24 3.5" | 20TB | 7,200 | CMR | — | 70.865/100 | $40.00 | $800 | | |
| Toshiba N300 3.5" | 20TB | 7,200 | CMR | 180 | 67.866/100 | $45.00 | $900 | | |
| Seagate Exos X20 3.5" | 20TB | 7,200 | CMR | — | 64.664/100 | $46.65 | $933 | | |
| Seagate BarraCuda 3.5" | 20TB | 7,200 | CMR | 120 | 50.752/100 | $50.00 | $1,000 | |
20TB Hard Drives: price, size and what to pick
What it costs. A 20TB hard drive runs $719.99 to $1,000.10 today across the 9 we have prices for, a typical $45.00/TB, with the Seagate IronWolf Pro 20TB the cheapest space at $36.00/TB. Prices come from several retailers and update daily.
Is 20TB the right size? 20TB is NAS and archive territory. It is the cheapest space per terabyte you can buy, and the reason to go this large is to fill fewer bays, not to spend less in total.
How long it lasts. Warranties at this size run 5 years typically, and a drive that survives its first year usually runs for many. Keep a backup regardless: a hard drive is a mechanical part.
Which one to pick. On specs alone the WD Red Pro 20TB leads the table at 85/100, while the Seagate IronWolf Pro 20TB gives you the most space for the money. Sort by value above to weigh the two against each other.
What to check at 20TB
Recording type first. Of the 20TB drives here, 9 are confirmed CMR and 0 are SMR. SMR drives pack tracks closer together and can slow sharply during long writes and RAID rebuilds, so a NAS or a backup target wants CMR. Then look at the workload rating, which says how much reading and writing per year the maker designs the drive for, and the warranty. 4 of these are NAS drives, rated to run continuously.
Every row is one drive at exactly this size. Open a drive’s name for its full spec sheet, price history and, where Backblaze covers the model, its measured failure rate. The hard drive hub lists every capacity.
See how hard drive prices are moving on the storage price tracker.
All 20TB Hard Drives (9)
Every drive on this page as a plain list, grouped by capacity.
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