The WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ costs $0.0521/GB while the Seagate - Expansion Desktop 8TB HDD - Black costs $0.0350/GB. Seagate - Expansion Desktop 8TB HDD - Black offers 33% better value per gigabyte as of July 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ vs Seagate - Expansion Desktop 8TB HDD - Black — Which Is Better Value?
Seagate - Expansion Desktop 8TB HDD - Black
Specification Comparison
| Spec | WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ | Seagate - Expansion Desktop 8TB HDD - Black |
|---|---|---|
| Brand | Western Digital | Seagate |
| Capacity | 8TB | 8 TB |
| $/GB | $0.0521 | $0.0350 |
| Price | $416.99 | $279.99 |
| Retailer | Newegg | Best Buy |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| 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 $0.0350//GB compared to the WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ at $0.0521//GB — that's roughly 33% less per gigabyte.
The best deal for the Seagate - Expansion Desktop 8TB HDD - Black is $279.99 at Best Buy, while the WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ starts at $416.99 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ and Seagate - Expansion Desktop 8TB HDD - Black product page for detailed specifications and price history.
Frequently Asked Questions
Is WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ or Seagate - Expansion Desktop 8TB HDD - Black a better deal?
As of July 2026, Seagate - Expansion Desktop 8TB HDD - Black offers better value at $0.0350//GB compared to WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ at $0.0521//GB. That is approximately 33% better value per gigabyte.
What is the price per GB of WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ?
The WD Purple 8TB Surveillance Internal Hard Drive HDD - SATA 6Gb/s 256MB Cache 3.5 Inch - WD85PURZ is currently priced at $0.0521/GB ($416.99 for 8TB) at Newegg.
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 $279.99 at Best Buy, which works out to $0.0350/GB.