Today's cheapest 18TB hard drive
New: Seagate Exos X20 18TB at $649 ($36.06/TB, 4 listings in this condition). Used / open box: Seagate Exos X20 18TB at $320 ($17.78/TB, 12 listings in this condition). Refurbished: WD Ultrastar HC550 18TB at $488 ($27.11/TB, 7 listings in this condition). Each figure is the single cheapest clean listing, so open the listing before buying; parts, lots and broken units are filtered out (how we price).
| Model | New | Used / open box | Refurbished | Typical | Listings |
|---|---|---|---|---|---|
| Seagate Exos X20 18TB 3.5" Hard Drive | $649 $36.06/TB | $320 $17.78/TB | $589 $32.72/TB | $599 | 21 |
| Seagate IronWolf Pro 18TB 3.5" Hard Drive | $658 $36.56/TB | $364 $20.19/TB | $500 $27.78/TB | $580 | 20 |
| Seagate Exos X18 18TB 3.5" Hard Drive | $688 $38.23/TB | $366 $20.34/TB | $519 $28.83/TB | $576 | 82 |
| WD Elements external 18TB External HDD (shuckable) | $706 $39.20/TB | $370 $20.56/TB | — | $821 | 19 |
| WD Ultrastar HC550 18TB 3.5" Hard Drive | $719 $39.94/TB | $415 $23.06/TB | $488 $27.11/TB | $546 | 49 |
| Toshiba MG09 18TB 3.5" Hard Drive | $765 $42.49/TB | $421 $23.39/TB | — | $802 | 9 |
| WD Red Pro 18TB 3.5" Hard Drive | $800 $44.44/TB | $477 $26.51/TB | $619 $34.39/TB | $1,022 | 20 |
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