The WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black costs $0.0575/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 44% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black 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?
WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black
Specification Comparison
| Spec | WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black | Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ |
|---|---|---|
| Brand | Western Digital | Western Digital |
| Capacity | 2 TB | 4 TB |
| $/GB | $0.0575 | $0.0324 |
| Price | $114.99 | $129.77 |
| Retailer | Best Buy | 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 WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black at $0.0575//GB — that's roughly 44% 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 WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black starts at $114.99 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 WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black 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 WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black 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 WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black at $0.0575//GB. That is approximately 44% better value per gigabyte.
What is the price per GB of WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black?
The WD - My Passport 2TB External USB 3.0 Portable Hard Drive - Black is currently priced at $0.0575/GB ($114.99 for 2 TB) 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.