The Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ costs $0.0405/GB while the Seagate - Expansion Desktop 8TB HDD - Black costs $0.0275/GB. Seagate - Expansion Desktop 8TB HDD - Black offers 32% better value per gigabyte as of March 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ vs Seagate - Expansion Desktop 8TB HDD - Black — Which Is Better Value?
Seagate - Expansion Desktop 8TB HDD - Black
Specification Comparison
| Spec | Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ | Seagate - Expansion Desktop 8TB HDD - Black |
|---|---|---|
| Brand | Western Digital | Seagate |
| Capacity | 8 TB | 8 TB |
| $/GB | $0.0405 | $0.0275 |
| Price | $323.99 | $219.99 |
| Retailer | Amazon | Best Buy |
| Category | Hard Drives & SSDs | Hard Drives & SSDs |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Seagate - Expansion Desktop 8TB HDD - Black offers better value at $0.0275//GB compared to the Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ at $0.0405//GB — that's roughly 32% less per gigabyte.
The best deal for the Seagate - Expansion Desktop 8TB HDD - Black is $219.99 at Best Buy, while the Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ starts at $323.99 at Amazon.
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 Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ and Seagate - Expansion Desktop 8TB HDD - Black product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ or Seagate - Expansion Desktop 8TB HDD - Black a better deal?
As of March 2026, Seagate - Expansion Desktop 8TB HDD - Black offers better value at $0.0275//GB compared to Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ at $0.0405//GB. That is approximately 32% better value per gigabyte.
What is the price per GB of Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ?
The Western Digital 8TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 128 MB Cache, 3.5" - WD84PURZ is currently priced at $0.0405/GB ($323.99 for 8 TB) at Amazon.
Where can I buy Seagate - Expansion Desktop 8TB HDD - Black for the cheapest price?
The cheapest price for the Seagate - Expansion Desktop 8TB HDD - Black is $219.99 at Best Buy, which works out to $0.0275/GB.