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External SSDs

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OWC Envoy Pro FX 4TB vs Sabrent Rocket XTRM-Q 2TB

Compare OWC Envoy Pro FX 4TB and Sabrent Rocket XTRM-Q 2TB side by side. Both are 4TB Thunderbolt 3 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Our Pick

OWC

OWC Envoy Pro FX 4TB
8.9/10

4TB of Thunderbolt 3 storage in an aluminum unibody barely larger than the 1TB. The Envoy Pro FX 4TB is a niche-of-one — buyers typically pay the premium for video editing workflows where 4000 MB/s sustained links plus 4TB of room actually matter.

Thunderbolt 3 + 4TB
Aluminum unibody
2800 sustained writes
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Sabrent

Sabrent Rocket XTRM-Q 2TB
8.6/10

The 2TB XTRM-Q is the model that put Sabrent's portable Thunderbolt line on the map for Mac users who needed internal-class speeds in an external chassis. Like the 1TB, it dedicated to Thunderbolt 3/4 hosts — on USB only you'll see Gen 2 speed (~1050 MB/s), not the headline 2700 MB/s.

Thunderbolt-class 2700 MB/s
Doubles capacity of base XTRM-Q
Cables included
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Spec Comparison

Spec
OWC Envoy Pro FX 4TB
Sabrent Rocket XTRM-Q 2TB
Read Speed
2.8 GB/s ✓
2.7 GB/s
Write Speed
2.8 GB/s ✓
2.7 GB/s
Capacity
4 TB ✓
2 TB
Interface
Thunderbolt 3
Thunderbolt 3
Endurance (TBW)
2,400 TB ✓
1,200 TB
Warranty
3 Years
3 Years
Score
8.9/10 ✓
8.6/10
Total Wins
5 wins
0 wins

Frequently Asked Questions

Which is better, OWC Envoy Pro FX 4TB or Sabrent Rocket XTRM-Q 2TB?
The OWC Envoy Pro FX 4TB scores 8.9/10 compared to 8.6/10 for the Sabrent Rocket XTRM-Q 2TB. Our expert analysis favors the OWC Envoy Pro FX 4TB for its superior speed.
What's the difference between OWC Envoy Pro FX 4TB and Sabrent Rocket XTRM-Q 2TB?
The key differences: The OWC Envoy Pro FX 4TB offers 2,800 MB/s reads vs 2,700 MB/s for the Sabrent Rocket XTRM-Q 2TB. Capacity options differ: OWC Envoy Pro FX 4TB is 4TB while Sabrent Rocket XTRM-Q 2TB is 2TB. The OWC Envoy Pro FX 4TB uses Thunderbolt 3 while the Sabrent Rocket XTRM-Q 2TB uses Thunderbolt 3.
Which is faster, OWC Envoy Pro FX 4TB or Sabrent Rocket XTRM-Q 2TB?
The OWC Envoy Pro FX 4TB is faster with 2,800 MB/s read speeds compared to 2,700 MB/s for the Sabrent Rocket XTRM-Q 2TB. That's a 4% speed advantage.
Which has better value, OWC Envoy Pro FX 4TB or Sabrent Rocket XTRM-Q 2TB?
The OWC Envoy Pro FX 4TB scores higher (8.9 vs 8.6/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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OWC Envoy Pro FX 4TB vs Samsung T9 2TB → Sabrent Rocket XTRM-Q 2TB vs Samsung T9 2TB →
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