The Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive costs $0.0335/GB while the Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) costs $0.0450/GB. Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive offers 26% better value per gigabyte as of July 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive vs Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) — Which Is Better Value?
Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB)
Specification Comparison
| Spec | Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive | Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) |
|---|---|---|
| Brand | Seagate | Glyph Production Technologies |
| Capacity | 20TB | 20 TB |
| $/GB | $0.0335 | $0.0450 |
| Price | $669.99 | $899.99 |
| Retailer | Newegg | Amazon |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive offers better value at $0.0335//GB compared to the Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) at $0.0450//GB — that's roughly 26% less per gigabyte.
The best deal for the Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive is $669.99 at Newegg, while the Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) starts at $899.99 at Amazon.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive and Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) product page for detailed specifications and price history.
Frequently Asked Questions
Is Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive or Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) a better deal?
As of July 2026, Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive offers better value at $0.0335//GB compared to Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) at $0.0450//GB. That is approximately 26% better value per gigabyte.
What is the price per GB of Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive?
The Seagate IronWolf Pro ST20000NT001 20TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive is currently priced at $0.0335/GB ($669.99 for 20TB) at Newegg.
Where can I buy Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) for the cheapest price?
The cheapest price for the Glyph BlackBox Pro External Hard Drive 7200 RPM, USB-C (3.1,Gen2) (20TB) is $899.99 at Amazon, which works out to $0.0450/GB.