The SanDisk Extreme PRO 128GB SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K costs $1.6602/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 SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K 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 PRO 128GB SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K | 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 | 128GB | 4 TB |
| $/GB | $1.6602 | $0.0324 |
| Price | $212.50 | $129.77 |
| Retailer | Newegg | 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 SanDisk Extreme PRO 128GB SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K at $1.6602//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 SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K starts at $212.50 at Newegg.
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 SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K 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 SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K 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 SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K at $1.6602//GB. That is approximately 98% better value per gigabyte.
What is the price per GB of SanDisk Extreme PRO 128GB SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K?
The SanDisk Extreme PRO 128GB SDXC UHS-II Card, Up to 300MB/s Read and 300MB/s Write speeds, V90, 8K is currently priced at $1.6602/GB ($212.50 for 128GB) at Newegg.
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.