The Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX costs $0.0281/GB while the Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) costs $0.0289/GB. Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX offers 3% better value per gigabyte as of April 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX vs Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) — Which Is Better Value?
Specification Comparison
| Spec | Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX | Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) |
|---|---|---|
| Brand | Western Digital | Seagate |
| Capacity | 16 TB | 18TB |
| $/GB | $0.0281 | $0.0289 |
| Price | $449.99 | $520.00 |
| Retailer | Amazon | Newegg |
| Category | Hard Drives & SSDs | Hard Drives & SSDs |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX offers better value at $0.0281//GB compared to the Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) at $0.0289//GB — that's roughly 3% less per gigabyte.
The best deal for the Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX is $449.99 at Amazon, while the Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) starts at $520.00 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX and Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX or Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) a better deal?
As of April 2026, Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX offers better value at $0.0281//GB compared to Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) at $0.0289//GB. That is approximately 3% better value per gigabyte.
What is the price per GB of Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX?
The Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD161KFGX is currently priced at $0.0281/GB ($449.99 for 16 TB) at Amazon.
Where can I buy Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) for the cheapest price?
The cheapest price for the Seagate Exos X18 ST18000NM001J 18 TB Hard Drive - Internal - SATA (SATA-600) is $520.00 at Newegg, which works out to $0.0289/GB.