The WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver costs $0.0350/GB while the Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 costs $0.0269/GB. Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 offers 23% better value per gigabyte as of March 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver vs Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 — Which Is Better Value?
WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver
Specification Comparison
| Spec | WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver | Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 |
|---|---|---|
| Brand | Western Digital | Seagate |
| Capacity | 4 TB | 4 TB |
| $/GB | $0.0350 | $0.0269 |
| Price | $139.99 | $107.71 |
| Retailer | Best Buy | Amazon |
| Category | Hard Drives & SSDs | Hard Drives & SSDs |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 offers better value at $0.0269//GB compared to the WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver at $0.0350//GB — that's roughly 23% less per gigabyte.
The best deal for the Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 is $107.71 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 WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver and Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 product page for detailed specifications and price history.
Frequently Asked Questions
Is WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver or Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 a better deal?
As of March 2026, Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 offers better value at $0.0269//GB compared to WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver at $0.0350//GB. That is approximately 23% better value per gigabyte.
What is the price per GB of WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver?
The WD - My Passport Ultra 4TB External USB 3.0 Portable Hard Drive - Silver is currently priced at $0.0350/GB ($139.99 for 4 TB) at Best Buy.
Where can I buy Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 for the cheapest price?
The cheapest price for the Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 is $107.71 at Amazon, which works out to $0.0269/GB.