The Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) costs $0.0348/GB while the WD - Purple 4TB Surveillance Internal Hard Drive costs $0.0350/GB. Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) offers 1% better value per gigabyte as of April 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) vs WD - Purple 4TB Surveillance Internal Hard Drive — Which Is Better Value?
WD - Purple 4TB Surveillance Internal Hard Drive
Specification Comparison
| Spec | Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) | WD - Purple 4TB Surveillance Internal Hard Drive |
|---|---|---|
| Brand | Seagate | Western Digital |
| Capacity | 4 TB | 4 TB |
| $/GB | $0.0348 | $0.0350 |
| Price | $139.00 | $139.99 |
| Retailer | Amazon | 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 Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) offers better value at $0.0348//GB compared to the WD - Purple 4TB Surveillance Internal Hard Drive at $0.0350//GB — that's roughly 1% less per gigabyte.
The best deal for the Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) is $139.00 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 Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) and WD - Purple 4TB Surveillance Internal Hard Drive product page for detailed specifications and price history.
Frequently Asked Questions
Is Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) or WD - Purple 4TB Surveillance Internal Hard Drive a better deal?
As of April 2026, Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) offers better value at $0.0348//GB compared to WD - Purple 4TB Surveillance Internal Hard Drive at $0.0350//GB. That is approximately 1% better value per gigabyte.
What is the price per GB of Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004)?
The Seagate Barracuda 4 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST4000DM004) is currently priced at $0.0348/GB ($139.00 for 4 TB) at Amazon.
Where can I buy WD - Purple 4TB Surveillance Internal Hard Drive for the cheapest price?
The cheapest price for the WD - Purple 4TB Surveillance Internal Hard Drive is $139.99 at Best Buy, which works out to $0.0350/GB.