The Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ costs $0.0533/GB while the ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives costs $0.0324/GB. ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives offers 39% better value per gigabyte as of April 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ vs ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives — Which Is Better Value?
Specification Comparison
| Spec | Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ | ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives |
|---|---|---|
| Brand | Western Digital | ST4000NM0035 |
| Capacity | 3 TB | 4TB |
| $/GB | $0.0533 | $0.0324 |
| Price | $160.00 | $129.60 |
| Retailer | Amazon | Newegg |
| Category | Hard Drives & SSDs | Hard Drives & SSDs |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives offers better value at $0.0324//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 $0.0533//GB — that's roughly 39% less per gigabyte.
The best deal for the ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives is $129.60 at Newegg, while the Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ starts at $160.00 at Amazon.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ and ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ or ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives a better deal?
As of April 2026, ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives offers better value at $0.0324//GB compared to Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ at $0.0533//GB. That is approximately 39% better value per gigabyte.
What is the price per GB of Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ?
The Western Digital 3TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD30PURZ is currently priced at $0.0533/GB ($160.00 for 3 TB) at Amazon.
Where can I buy ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives for the cheapest price?
The cheapest price for the ST4000NM0035 Enterprise-class 4TB SATA Monitors 4T Hard Drives is $129.60 at Newegg, which works out to $0.0324/GB.