The WD - Purple 4TB Surveillance Internal Hard Drive costs $0.0350/GB while the Seagate 4 TB 3.5" Internal Hard Drive costs $0.0341/GB. Seagate 4 TB 3.5" Internal Hard Drive offers 3% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
WD - Purple 4TB Surveillance Internal Hard Drive vs Seagate 4 TB 3.5" Internal Hard Drive — Which Is Better Value?
WD - Purple 4TB Surveillance Internal Hard Drive
Seagate 4 TB 3.5" Internal Hard Drive
Specification Comparison
| Spec | WD - Purple 4TB Surveillance Internal Hard Drive | Seagate 4 TB 3.5" Internal Hard Drive |
|---|---|---|
| Brand | Western Digital | Seagate |
| Capacity | 4 TB | 4 TB |
| $/GB | $0.0350 | $0.0341 |
| Price | $139.99 | $136.47 |
| Retailer | Best Buy | Amazon |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Seagate 4 TB 3.5" Internal Hard Drive offers better value at $0.0341//GB compared to the WD - Purple 4TB Surveillance Internal Hard Drive at $0.0350//GB — that's roughly 3% less per gigabyte.
The best deal for the Seagate 4 TB 3.5" Internal Hard Drive is $136.47 at Amazon, while the WD - Purple 4TB Surveillance Internal Hard Drive starts at $139.99 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 4TB Surveillance Internal Hard Drive and Seagate 4 TB 3.5" Internal Hard Drive product page for detailed specifications and price history.
Frequently Asked Questions
Is WD - Purple 4TB Surveillance Internal Hard Drive or Seagate 4 TB 3.5" Internal Hard Drive a better deal?
As of May 2026, Seagate 4 TB 3.5" Internal Hard Drive offers better value at $0.0341//GB compared to WD - Purple 4TB Surveillance Internal Hard Drive at $0.0350//GB. That is approximately 3% better value per gigabyte.
What is the price per GB of WD - Purple 4TB Surveillance Internal Hard Drive?
The WD - Purple 4TB Surveillance Internal Hard Drive is currently priced at $0.0350/GB ($139.99 for 4 TB) at Best Buy.
Where can I buy Seagate 4 TB 3.5" Internal Hard Drive for the cheapest price?
The cheapest price for the Seagate 4 TB 3.5" Internal Hard Drive is $136.47 at Amazon, which works out to $0.0341/GB.