The Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ costs $0.0303/GB while the WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver costs $0.0350/GB. Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ offers 13% better value per gigabyte as of March 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ vs WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver — Which Is Better Value?
WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver
Specification Comparison
| Spec | Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ | WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver |
|---|---|---|
| Brand | Western Digital | Western Digital |
| Capacity | 4 TB | 4 TB |
| $/GB | $0.0303 | $0.0350 |
| Price | $121.26 | $139.99 |
| Retailer | Amazon | Best Buy |
| Category | Hard Drives & SSDs | Hard Drives & SSDs |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ offers better value at $0.0303//GB compared to the WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver at $0.0350//GB — that's roughly 13% less per gigabyte.
The best deal for the Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ is $121.26 at Amazon, while the WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver starts at $139.99 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 Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ and WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ or WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver a better deal?
As of March 2026, Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ offers better value at $0.0303//GB compared to WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver at $0.0350//GB. That is approximately 13% better value per gigabyte.
What is the price per GB of Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ?
The Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ is currently priced at $0.0303/GB ($121.26 for 4 TB) at Amazon.
Where can I buy WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver for the cheapest price?
The cheapest price for the WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver is $139.99 at Best Buy, which works out to $0.0350/GB.