The Seagate 4 TB 3.5" Internal Hard Drive costs $0.0341/GB while the Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ costs $0.0577/GB. Seagate 4 TB 3.5" Internal Hard Drive offers 41% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Seagate 4 TB 3.5" Internal Hard Drive vs Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ — Which Is Better Value?
Seagate 4 TB 3.5" Internal Hard Drive
Specification Comparison
| Spec | Seagate 4 TB 3.5" Internal Hard Drive | Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ |
|---|---|---|
| Brand | Seagate | Western Digital |
| Capacity | 4 TB | 3 TB |
| $/GB | $0.0341 | $0.0577 |
| Price | $136.47 | $173.00 |
| Retailer | Amazon | 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 Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ at $0.0577//GB — that's roughly 41% less per gigabyte.
The best deal for the Seagate 4 TB 3.5" Internal Hard Drive is $136.47 at Amazon, while the Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ starts at $173.00 at Amazon.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Seagate 4 TB 3.5" Internal Hard Drive and Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ product page for detailed specifications and price history.
Frequently Asked Questions
Is Seagate 4 TB 3.5" Internal Hard Drive or Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ a better deal?
As of May 2026, Seagate 4 TB 3.5" Internal Hard Drive offers better value at $0.0341//GB compared to Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ at $0.0577//GB. That is approximately 41% better value per gigabyte.
What is the price per GB of Seagate 4 TB 3.5" Internal Hard Drive?
The Seagate 4 TB 3.5" Internal Hard Drive is currently priced at $0.0341/GB ($136.47 for 4 TB) at Amazon.
Where can I buy Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ for the cheapest price?
The cheapest price for the Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ is $173.00 at Amazon, which works out to $0.0577/GB.