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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 · 3 listings
$400.00
$22.22 / TB

Total includes shipping

UsedBuy on eBay →

prices last checked 2026-10-16 18:07 UTC

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deal rating
4 — Good deal

uglyHD's price-history score 3.6 · five pumpkins is an amazing, off-the-chart deal · how it’s scored

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price history
Lowest / TB
$13.89
Median / TB
$23.03
Current / TB
$22.22
$10.77$20.14$29.522026-09-112026-10-16
2026-10-16$22.22 / TB
all listings
Marketplace listings for this drive
SourceConditionPriceShip$/TB
ebayUsed$400.00free$22.22Buy →
ebayRefurb$549.00free$30.50Buy →
ebayNew$609.00free$33.83Buy →
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.

Seagate Exos X12 12TB$14.17/TBWD Ultrastar DC HC510 8TB$15.63/TBSeagate IronWolf 10TB$15.99/TBToshiba MG07 14TB$16.50/TBHGST Ultrastar 7K4000 3TB$16.67/TBSeagate Constellation ES.3 2TB$17.50/TB
related drives
WD Ultrastar DC HC550 16TB SATAsame model, other capacity$24.94/TBSeagate Exos X18 18TB SATAother 18TB SATA drive$20.27/TBSeagate Exos X20 18TB SATAother 18TB SATA drive$21.94/TBSeagate IronWolf Pro 18TB SATAother 18TB SATA drive$22.06/TBToshiba MG09 18TB SATAother 18TB SATA drive$25.11/TB