The SANDISK - Extreme PRO 128GB SD UHS-II V90 Card costs $2.0312/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 98% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
SANDISK - Extreme PRO 128GB SD UHS-II V90 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?
SANDISK - Extreme PRO 128GB SD UHS-II V90 Card
Specification Comparison
| Spec | SANDISK - Extreme PRO 128GB SD UHS-II V90 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 | 128 GB | 4 TB |
| $/GB | $2.0312 | $0.0324 |
| Price | $259.99 | $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 PRO 128GB SD UHS-II V90 Card at $2.0312//GB — that's roughly 98% 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 PRO 128GB SD UHS-II V90 Card starts at $259.99 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 PRO 128GB SD UHS-II V90 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 PRO 128GB SD UHS-II V90 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 PRO 128GB SD UHS-II V90 Card at $2.0312//GB. That is approximately 98% better value per gigabyte.
What is the price per GB of SANDISK - Extreme PRO 128GB SD UHS-II V90 Card?
The SANDISK - Extreme PRO 128GB SD UHS-II V90 Card is currently priced at $2.0312/GB ($259.99 for 128 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.