The Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ costs $0.0355/GB while the SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks costs $0.5859/GB. Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ offers 94% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ vs SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks — Which Is Better Value?
Specification Comparison
| Spec | Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ | SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks |
|---|---|---|
| Brand | Western Digital | SanDisk |
| Capacity | 4 TB | 128 GB |
| $/GB | $0.0355 | $0.5859 |
| Price | $141.99 | $74.99 |
| Retailer | Amazon | Best Buy |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | micro-sd |
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 $0.0355//GB compared to the SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks at $0.5859//GB — that's roughly 94% 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 $141.99 at Amazon, while the SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks starts at $74.99 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 Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ and SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ or SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks 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 $0.0355//GB compared to SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks at $0.5859//GB. That is approximately 94% better value per gigabyte.
What is the price per GB of Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ?
The Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ is currently priced at $0.0355/GB ($141.99 for 4 TB) at Amazon.
Where can I buy SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks for the cheapest price?
The cheapest price for the SANDISK - Extreme Pro 128GB SDXC UHS-I National Parks is $74.99 at Best Buy, which works out to $0.5859/GB.