The ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (Black) costs $0.0658/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 51% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (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?
Specification Comparison
| Spec | ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (Black) | Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ |
|---|---|---|
| Brand | ModusTech | Western Digital |
| Capacity | 500 GB | 4 TB |
| $/GB | $0.0658 | $0.0324 |
| Price | $32.91 | $129.77 |
| Retailer | Amazon | Amazon |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (Black)
Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD43PURZ
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 ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (Black) at $0.0658//GB — that's roughly 51% 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 ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (Black) starts at $32.91 at Amazon.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (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 ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (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 ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (Black) at $0.0658//GB. That is approximately 51% better value per gigabyte.
What is the price per GB of ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (Black)?
The ModusTech 500GB Portable External Hard Drive USB 3.0/Type-C – Slim High-Speed HDD for Backup, Storage, Gaming – Compatible with PC, Mac, Laptop, PS4, PS5, Xbox, Windows, MacBook, Smart TV (Black) is currently priced at $0.0658/GB ($32.91 for 500 GB) at Amazon.
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.