The SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card costs $0.3515/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 91% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card 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 | SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card | Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ |
|---|---|---|
| Brand | SanDisk | Western Digital |
| Capacity | 512 GB | 4 TB |
| $/GB | $0.3515 | $0.0324 |
| Price | $179.99 | $129.77 |
| Retailer | Best Buy | Amazon |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | micro-sd | 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 SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card at $0.3515//GB — that's roughly 91% 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 SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card starts at $179.99 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 SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card 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 SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card 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 SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card at $0.3515//GB. That is approximately 91% better value per gigabyte.
What is the price per GB of SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card?
The SANDISK - Extreme PLUS 512GB SDHC/SDXC UHS-I Memory Card is currently priced at $0.3515/GB ($179.99 for 512 GB) at Best Buy.
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.