The Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ costs $0.0400/GB while the Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray costs $0.0487/GB. Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ offers 18% better value per gigabyte as of August 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ vs Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray — Which Is Better Value?
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Specification Comparison
| Spec | Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ | Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray |
|---|---|---|
| Brand | Western Digital | Seagate |
| Capacity | 8 TB | 8TB |
| $/GB | $0.0400 | $0.0487 |
| Price | $320.23 | $389.85 |
| Retailer | Amazon | Newegg |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ offers better value at $0.0400//GB compared to the Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray at $0.0487//GB — that's roughly 18% less per gigabyte.
The best deal for the Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ is $320.23 at Amazon, while the Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray starts at $389.85 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 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ and Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ or Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray a better deal?
As of August 2026, Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ offers better value at $0.0400//GB compared to Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray at $0.0487//GB. That is approximately 18% better value per gigabyte.
What is the price per GB of Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ?
The Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ is currently priced at $0.0400/GB ($320.23 for 8 TB) at Amazon.
Where can I buy Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray for the cheapest price?
The cheapest price for the Seagate 8TB USB 3.0 Hard Drives - Desktop External Space Gray is $389.85 at Newegg, which works out to $0.0487/GB.