0 drives tracked. Prices updated about once a day.
| Buy | Details |
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No seller we track has a 18TB SAS hard drive in stock right now. That describes today's listings only - it says nothing about whether these models are discontinued. The tracked listings above return here when stock does.
6 in-stock listings · Live prices; the cheapest offer per drive. · ranked by live cost per tb, refreshed about once a day
| Drive | Capacity | Interface | Recording | Condition | $/TB | Price | |
|---|---|---|---|---|---|---|---|
| WD Purple 18TB WD180PURZ WD180PURZ | 18TB | SATA-6G | — | REFURB | $28.33 | $510 | Buy on Amazon |
| WD Red Pro 18TB WD181KFGX WD181KFGX | 18TB | SATA-6G | CMR | REFURB | $34.39 | $619 | Buy on Amazon |
| Toshiba MG09 18TB MG09ACA18TE | 18TB | SATA-6G | CMR | REFURB | $35.28 | $635 | Buy on Amazon |
| WD Gold 18TB | 18TB | SATA-6G | — | REFURB | $36.61 | $659 | Buy on Amazon |
| WD Purple Pro 18TB WD181PURP WD181PURP | 18TB | SATA-6G | CMR | REFURB | $38.89 | $700 | Buy on Amazon |
| Seagate Exos X20 18TB SATA ST18000NM003D | 18TB | SATA-6G | — | NEW | $42.49 | $765 | Buy on Amazon |
Guides for this capacity: best 18TB hard drive · the HDD price forecast · fill a NAS at today's prices
Every listing we track at this size - 3 product pages, including ones with no current offer. Out-of-stock pages carry specs and in-stock alternatives, never a stale price.
18TB SAS vs 18TB SATA → (coming soon)
MDD (MaxDigital Data) drives are rebranded enterprise mechanisms at steep discounts. They ship new with 5-year warranties and are identical internally to Seagate Exos or HGST Ultrastar.
Energy-assisted PMR (ePMR) is used by WD Ultrastar DC HC550+ for 18TB+. It is NOT shingled - ePMR is a CMR variant that uses current-assisted recording for higher density. Safe for all workloads.
14-20TB nearline SAS drives currently offer the best $/TB in enterprise storage. Larger capacities may have better density but carry a price premium per TB.
At 14TB+ there is often a SATA equivalent at lower cost. SAS is worth the premium if you need dual-port multipath, faster error recovery, or SAS expander backplanes.
None right now: all 0 tracked 18TB SAS listings are out of stock. The table fills back in when an offer returns; nearby capacities are linked on this page.
None of the 0 tracked listings has a manufacturer-sourced recording value yet, so this page states none - an unsourced drive is never assumed CMR.
Monthly average of every listing tracked that month, new and used together. A level, not a price change: it moves when the mix of listings changes.
Get emailed when 18TB SAS drops below your target $/TB.
SAS enterprise HDDs suit nearline and backup workloads requiring dual-port multipath and high sustained throughput.