The Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) costs $0.0362/GB while the WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive costs $0.0327/GB. WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive offers 10% better value per gigabyte as of August 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) vs WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive — Which Is Better Value?
WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive
Prices refresh twice daily; the final price appears at the retailer's checkout. We may earn a commission from retailer links, at no cost to you; it never affects rankings.
Specification Comparison
| Spec | Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) | WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive |
|---|---|---|
| Brand | Seagate | Western Digital |
| Capacity | 16TB | 18TB |
| $/GB | $0.0362 | $0.0327 |
| Price | $579.99 | $589.00 |
| Retailer | Newegg | Newegg |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive offers better value at $0.0327//GB compared to the Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) at $0.0362//GB — that's roughly 10% less per gigabyte.
The best deal for the WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive is $589.00 at Newegg, while the Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) starts at $579.99 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) and WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive product page for detailed specifications and price history.
Frequently Asked Questions
Is Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) or WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive a better deal?
As of August 2026, WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive offers better value at $0.0327//GB compared to Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) at $0.0362//GB. That is approximately 10% better value per gigabyte.
What is the price per GB of Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004)?
The Seagate Skyhawk AI SATA III 3.5' Internal Hard Drive - 16TB, Single, 512MB Cache (ST16000VE004) is currently priced at $0.0362/GB ($579.99 for 16TB) at Newegg.
Where can I buy WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive for the cheapest price?
The cheapest price for the WD Purple WD180PURZ 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Hard Drive is $589.00 at Newegg, which works out to $0.0327/GB.