The Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ costs $0.0300/GB while the WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN costs $0.0342/GB. Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ offers 12% better value per gigabyte as of April 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ vs WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN — Which Is Better Value?
Specification Comparison
| Spec | Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ | WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN |
|---|---|---|
| Brand | Western Digital | Western Digital |
| Capacity | 2 TB | 4 TB |
| $/GB | $0.0300 | $0.0342 |
| Price | $59.99 | $136.76 |
| Retailer | Amazon | Amazon |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ
WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN
Which Should You Buy?
Based on current pricing data, the Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ offers better value at $0.0300//GB compared to the WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN at $0.0342//GB — that's roughly 12% less per gigabyte.
The best deal for the Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ is $59.99 at Amazon, while the WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN starts at $136.76 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 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ and WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ or WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN a better deal?
As of April 2026, Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ offers better value at $0.0300//GB compared to WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN at $0.0342//GB. That is approximately 12% better value per gigabyte.
What is the price per GB of Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ?
The Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD20PURZ is currently priced at $0.0300/GB ($59.99 for 2 TB) at Amazon.
Where can I buy WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN for the cheapest price?
The cheapest price for the WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN is $136.76 at Amazon, which works out to $0.0342/GB.