The Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) costs $0.0279/GB while the Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray costs $0.0675/GB. Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) offers 59% better value per gigabyte as of August 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) vs Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray — Which Is Better Value?
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Specification Comparison
| Spec | Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) | Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray |
|---|---|---|
| Brand | Seagate | Rocstor |
| Capacity | 20TB | 20TB |
| $/GB | $0.0279 | $0.0675 |
| Price | $559.00 | $1349.59 |
| Retailer | Newegg | Newegg |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) offers better value at $0.0279//GB compared to the Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray at $0.0675//GB — that's roughly 59% less per gigabyte.
The best deal for the Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) is $559.00 at Newegg, while the Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray starts at $1349.59 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) and Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray product page for detailed specifications and price history.
Frequently Asked Questions
Is Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) or Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray a better deal?
As of August 2026, Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) offers better value at $0.0279//GB compared to Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray at $0.0675//GB. That is approximately 59% better value per gigabyte.
What is the price per GB of Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR)?
The Seagate Exos X20z ST20000NM001J 20TB 7.2K RPM SATA 6Gb/s 3.5 (HOST MANAGED SMR) is currently priced at $0.0279/GB ($559.00 for 20TB) at Newegg.
Where can I buy Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray for the cheapest price?
The cheapest price for the Rocstor Rocpro D90 20 TB Desktop Rugged Hard Drive External SATA SATA/600 Aluminum Gray is $1349.59 at Newegg, which works out to $0.0675/GB.