17 drives tracked. From $17.17/TB. Updated every 4 hours.
At $17.17/TB, WD 18TB SATA drives are $18.64/TB cheaper than the 18TB SATA category average of $35.81/TB — strong value at this capacity.
WD 18TB SATA drives include the Ultrastar DC enterprise line and Red Pro NAS series. Both use CMR recording and carry 5-year warranties. From $17.17/TB.
| $/TB ▲ | Brand / Model | Cap | Interface | Tech | Cache | Sector | Wty | Price | Cond. | 90D | Buy | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
👑$17.17 ~ 30d avg | WD Ultrastar DC HC550 18TB SATA WUH721818ALE6L4 5yr | 18TB | SATA-6G 7,200 RPM | ePMR | 512MB | 512e | 5yr | $309.00 | new | Buy →Details | ▼ | |
$28.64 ↓ vs 30d avg | WD WD Purple 18TB WD180PURZ WD180PURZ Refurb · | 18TB | SATA-6G | — | — | — | — | $515.49 | REFURB | Buy →Details | ▼ | |
$28.89 ↓ vs 30d avg | WD DC HC550 18TB SATA 512MB Enterprise WUH721818ALE6L4 Refurb · 5yr | 18TB | SATA-6G 7,200 RPM | ePMR | 512MB | 512e | 5yr | $519.99 | REFURB | Buy →Details | ▼ | |
$30.22 ~ 30d avg | WD WD Red Pro 18TB WD181KFGX WD181KFGX Refurb · CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | 512MB | — | 5yr | $544.00 | REFURB | Buy →Details | ▼ | |
$31.06 ~ 30d avg | WD WD Red Pro 18TB WD181KFGX WD181KFGX Refurb · CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | 512MB | — | 5yr | $559.00 | REFURB | Buy →Details | ▼ | |
$33.33 ~ 30d avg | WD Ultrastar 18TB SATA Refurb · CMR · | 18TB | SATA-6G | CMR | — | — | — | $599.99 | REFURB | Buy →Details | ▼ | |
$33.33 ~ 30d avg | WD Ultrastar 18TB SATA Refurb · CMR · | 18TB | SATA-6G | CMR | — | — | — | $599.99 | REFURB | Buy →Details | ▼ | |
$33.33 ↓ vs 30d avg | WD WD Purple Pro 18TB WD181PURP WD181PURP Refurb · CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | 512MB | — | 5yr | $599.99 | REFURB | Buy →Details | ▼ | |
$33.33 ↓ vs 30d avg | WD WD Gold 18TB Refurb · CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | — | — | 5yr | $599.99 | REFURB | Buy →Details | ▼ | |
$36.11 ~ 30d avg | WD Ultrastar 18TB SATA CMR · | 18TB | SATA-6G | CMR | — | — | — | $649.99 | new | Buy →Details | ▼ | |
$44.14 ↑ vs 30d avg | WD DC HC550 18TB SATA 512MB Enterprise WUH721818ALE6L4 5yr | 18TB | SATA-6G 7,200 RPM | ePMR | 512MB | 512e | 5yr | $794.45 | new | Buy →Details | ▼ | |
$44.17 ↑ vs 30d avg | WD WD Purple Pro 18TB WD181PURP WD181PURP CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | 512MB | — | 5yr | $794.99 | new | Buy →Details | ▼ | |
$44.28 ~ 30d avg | WD WD Gold 18TB Refurb · CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | — | — | 5yr | $797.00 | REFURB | Buy →Details | ▼ | |
$44.28 ↓ vs 30d avg | WD WD Gold 18TB Refurb · CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | — | — | 5yr | $797.00 | REFURB | Buy →Details | ▼ | |
$50.54 ↑ vs 30d avg | WD WD Gold 18TB CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | — | — | 5yr | $909.67 | new | Buy →Details | ▼ | |
$54.94 ↑ vs 30d avg | WD WD Purple 18TB WD180PURZ WD180PURZ | 18TB | SATA-6G | — | — | — | — | $989.00 | new | Buy →Details | ▼ | |
$60.98 ↑ vs 30d avg | WD WD Gold 18TB CMR · 5yr | 18TB | SATA-6G 7,200 RPM | CMR | — | — | 5yr | $1,097.62 | new | Buy →Details | ▼ |
WD enterprise SATA drives (Ultrastar, Gold) use CMR. WD Red non-Pro models in some capacities use SMR - always verify the model number. Red Pro and Red Plus are CMR.
WD 18TB SATA drives are compatible with all major NAS platforms including Synology DiskStation, QNAP, TrueNAS, UnRAID, and any server with SATA ports. Check your NAS manufacturer's compatibility list for confirmed models.
Both are available. New drives carry full manufacturer warranty. Refurbished units are datacenter pulls with low hours - excellent value for secondary storage and backup targets.