The WD - Purple 8TB Surveillance Internal Hard Drive costs $0.0444/GB while the Seagate - Expansion Desktop 8TB HDD - Black costs $0.0350/GB. Seagate - Expansion Desktop 8TB HDD - Black offers 21% 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 vs Seagate - Expansion Desktop 8TB HDD - Black — Which Is Better Value?
WD - Purple 8TB Surveillance Internal Hard Drive
Seagate - Expansion Desktop 8TB HDD - Black
Specification Comparison
| Spec | WD - Purple 8TB Surveillance Internal Hard Drive | Seagate - Expansion Desktop 8TB HDD - Black |
|---|---|---|
| Brand | Western Digital | Seagate |
| Capacity | 8 TB | 8 TB |
| $/GB | $0.0444 | $0.0350 |
| Price | $354.99 | $279.99 |
| Retailer | Best Buy | 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 at $0.0444//GB — that's roughly 21% 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 starts at $354.99 at Best Buy.
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 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 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 at $0.0444//GB. That is approximately 21% better value per gigabyte.
What is the price per GB of WD - Purple 8TB Surveillance Internal Hard Drive?
The WD - Purple 8TB Surveillance Internal Hard Drive is currently priced at $0.0444/GB ($354.99 for 8 TB) at Best Buy.
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.