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 while the Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one costs $0.1437/GB. Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ offers 77% 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 Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one — 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 | Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one |
|---|---|---|
| Brand | Western Digital | Tianken |
| Capacity | 4 TB | 160 GB |
| $/GB | $0.0324 | $0.1437 |
| Price | $129.77 | $22.99 |
| Retailer | Amazon | 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 Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one at $0.1437//GB — that's roughly 77% 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 Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one starts at $22.99 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 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ and Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one 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 Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one 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 Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one at $0.1437//GB. That is approximately 77% 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 $0.0324/GB ($129.77 for 4 TB) at Amazon.
Where can I buy Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one for the cheapest price?
The cheapest price for the Tianken 160GB Ultra Slim Portable External Hard Drive USB 3.1 Type C HDD Storage for PC, Mac, Laptop, PS4, Xbox one is $22.99 at Amazon, which works out to $0.1437/GB.