The Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS costs $0.2380/GB while the Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ costs $0.0324/GB. Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ offers 86% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS vs Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ — Which Is Better Value?
Specification Comparison
| Spec | Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS | Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ |
|---|---|---|
| Brand | Seagate | Western Digital |
| Capacity | 500 GB | 4 TB |
| $/GB | $0.2380 | $0.0324 |
| Price | $119.00 | $129.77 |
| 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 Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ offers better value at $0.0324//GB compared to the Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS at $0.2380//GB — that's roughly 86% less per gigabyte.
The best deal for the Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ is $129.77 at Amazon, while the Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS starts at $119.00 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 Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS and Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ product page for detailed specifications and price history.
Frequently Asked Questions
Is Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS or Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ a better deal?
As of May 2026, Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ offers better value at $0.0324//GB compared to Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS at $0.2380//GB. That is approximately 86% better value per gigabyte.
What is the price per GB of Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS?
The Seagate Constellation 500 GB 7200RPM SATA 3Gb/s 32 MB Cache 2.5 Inch Internal Hard Drive - Bare Drive ST9500530NS is currently priced at $0.2380/GB ($119.00 for 500 GB) at Amazon.
Where can I buy Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ for the cheapest price?
The cheapest price for the Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ is $129.77 at Amazon, which works out to $0.0324/GB.