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HDD · SATA

WD Ultrastar DC HC550 18TB

part number WUH721818ALE6L4

Capacity
18TB
Connection
SATA
Hardware
3.5" HDD · CMR
Best available offer · 6 listings
$400.00
$22.22 / TB

Total includes shipping

UsedBuy on eBay →

prices last checked 2026-10-14 02:07 UTC

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deal rating
4 — Good deal

uglyHD's price-history score 3.8 · six pumpkins is an amazing, off-the-chart deal · how it’s scored

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price history
Lowest / TB
$13.89
Median / TB
$23.83
Current / TB
$22.22
$10.77$20.14$29.522026-09-112026-10-14
2026-10-14$22.22 / TB
all listings
Marketplace listings for this drive
SourceConditionPriceShip$/TB
ebayUsed$400.00free$22.22Buy →
ebayRefurb$539.00free$29.94Buy →
newegg
Server Part Deals
New$539.00free$29.94Buy →
newegg
C.N.E Technology
New$567.70free$31.54Buy →
ebayNew$719.00free$39.94Buy →
newegg
Jescor
New$840.40free$46.69Buy →
head to head
vs Seagate Exos X18 18TB→vs Seagate Exos X20 18TB→
cheaper per terabyte

Same interface and drive class, less money per terabyte.

Toshiba MG04 2TB$12.50Seagate Exos X12 12TB$14.17Toshiba MG06 10TB$15.00WD Ultrastar DC HC510 8TB$15.63Seagate IronWolf 10TB$15.99Toshiba MG07 14TB$16.50
related drives
WD Ultrastar DC HC550 16TB SATAsame model, other capacity$22.44Seagate Exos X18 18TB SATAother 18TB SATA drive$20.17Seagate IronWolf Pro 18TB SATAother 18TB SATA drive$21.67Seagate Exos X20 18TB SATAother 18TB SATA drive$22.22Toshiba MG09 18TB SATAother 18TB SATA drive$25.11