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External SSDs

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Sabrent Rocket XTRM-Q 4TB vs SSK PM510 USB4 1TB

Compare Sabrent Rocket XTRM-Q 4TB and SSK PM510 USB4 1TB 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

Sabrent

Sabrent Rocket XTRM-Q 4TB
8.7/10

A 4TB Thunderbolt 3 portable SSD is genuinely rare — most vendors cap at 2TB. The 4TB XTRM-Q is the enthusiast-choice for working 8K RED RAW footage in the field. Price is high but for revenue-grade video work that needs the speed, nothing else at this capacity competes.

2700 MB/s Thunderbolt
4TB of high-speed storage
3-year manufacturer warranty
Check on Amazon →

SSK

SSK PM510 USB4 1TB
8.6/10

AUSB4 portable at enthusiast-grade specs — 3200 MB/s read over USB4 / Thunderbolt 4 hosts. The PM510 is one of the more affordable USB4 portables, an entry point for video editors who need Thunderbolt-class speeds but don't want to pay LaCie or OWC premium.

USB4 3200 MB/s
Thunderbolt 4 compatible
Aluminum body
Check on Amazon →

Spec Comparison

Spec
Sabrent Rocket XTRM-Q 4TB
SSK PM510 USB4 1TB
Read Speed
2.7 GB/s
3.2 GB/s ✓
Write Speed
2.7 GB/s
2.8 GB/s ✓
Capacity
4 TB ✓
1 TB
Interface
Thunderbolt 3
USB4
Endurance (TBW)
2,400 TB ✓
600 TB
Warranty
3 Years
3 Years
Score
8.7/10 ✓
8.6/10
Total Wins
3 wins
2 wins

Frequently Asked Questions

Which is better, Sabrent Rocket XTRM-Q 4TB or SSK PM510 USB4 1TB?
The Sabrent Rocket XTRM-Q 4TB scores 8.7/10 compared to 8.6/10 for the SSK PM510 USB4 1TB. Our expert analysis favors the Sabrent Rocket XTRM-Q 4TB for its superior value.
What's the difference between Sabrent Rocket XTRM-Q 4TB and SSK PM510 USB4 1TB?
The key differences: The Sabrent Rocket XTRM-Q 4TB offers 2,700 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 1TB. Capacity options differ: Sabrent Rocket XTRM-Q 4TB is 4TB while SSK PM510 USB4 1TB is 1TB. The Sabrent Rocket XTRM-Q 4TB uses Thunderbolt 3 while the SSK PM510 USB4 1TB uses USB4.
Which is faster, Sabrent Rocket XTRM-Q 4TB or SSK PM510 USB4 1TB?
The SSK PM510 USB4 1TB is faster with 3,200 MB/s read speeds compared to 2,700 MB/s for the Sabrent Rocket XTRM-Q 4TB. That's a 19% speed advantage.
Which has better value, Sabrent Rocket XTRM-Q 4TB or SSK PM510 USB4 1TB?
The Sabrent Rocket XTRM-Q 4TB scores higher (8.7 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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