The Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) costs $0.0546/GB while the Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) costs $0.0374/GB. Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) offers 32% better value per gigabyte as of July 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) vs Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) — Which Is Better Value?
Specification Comparison
| Spec | Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) | Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) |
|---|---|---|
| Brand | Apricorn | Seagate |
| Capacity | 18TB | 18TB |
| $/GB | $0.0546 | $0.0374 |
| Price | $982.99 | $672.99 |
| Retailer | Newegg | Newegg |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB)
Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D)
Which Should You Buy?
Based on current pricing data, the Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) offers better value at $0.0374//GB compared to the Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) at $0.0546//GB — that's roughly 32% less per gigabyte.
The best deal for the Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) is $672.99 at Newegg, while the Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) starts at $982.99 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) and Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) product page for detailed specifications and price history.
Frequently Asked Questions
Is Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) or Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) a better deal?
As of July 2026, Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) offers better value at $0.0374//GB compared to Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) at $0.0546//GB. That is approximately 32% better value per gigabyte.
What is the price per GB of Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB)?
The Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) is currently priced at $0.0546/GB ($982.99 for 18TB) at Newegg.
Where can I buy Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) for the cheapest price?
The cheapest price for the Seagate Exos X20 ST18000NM003D 18TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive (ST18000NM003D) is $672.99 at Newegg, which works out to $0.0374/GB.