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Portable SSDs

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Crucial X6 Portable 1TB vs SSK PM510 USB4 Portable 1TB — Which Portable SSD Is Faster & Better Value?

Compare Crucial X6 Portable 1TB and SSK PM510 USB4 Portable 1TB side by side. Both are 1TB USB 3.2 Gen 2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Crucial

Crucial X6 Portable 1TB
7.6/10

A budget 1TB Gen 2 portable for the portable-SSD crowd — 800 MB/s is below the Gen 2 ceiling but exactly what's needed for Time Machine and laptop backup workflows that don't depend on peak speeds. Picks IP-rating-free build to keep price aggressive.

800 MB/s read
Budget pricing
PS5/Xbox cold-library compatible
Check on Amazon →
Our Pick

SSK

SSK PM510 USB4 Portable 1TB
8.6/10

A USB4 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 do not want to pay LaCie or OWC premium.

USB4 3200 MB/s
Thunderbolt 4 compatible
Aluminum body
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Spec Comparison

Spec
Crucial X6 Portable 1TB
SSK PM510 USB4 Portable 1TB
Read Speed
800 MB/s
3.2 GB/s ✓
Write Speed
800 MB/s
2.8 GB/s ✓
Capacity
1 TB
1 TB
Interface
USB 3.2 Gen 2
USB4
Endurance (TBW)
600 TB
600 TB
Warranty
3 Years
3 Years
Score
7.6/10
8.6/10 ✓
Total Wins
0 wins
3 wins

Frequently Asked Questions

Which is better, Crucial X6 Portable 1TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB scores 8.6/10 compared to 7.6/10 for the Crucial X6 Portable 1TB. Our expert analysis favors the SSK PM510 USB4 Portable 1TB for its superior speed.
What's the difference between Crucial X6 Portable 1TB and SSK PM510 USB4 Portable 1TB?
The key differences: The Crucial X6 Portable 1TB offers 800 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 Portable 1TB. Capacity options differ: Crucial X6 Portable 1TB is 1TB while SSK PM510 USB4 Portable 1TB is 1TB. The Crucial X6 Portable 1TB uses USB 3.2 Gen 2 while the SSK PM510 USB4 Portable 1TB uses USB4.
Which is faster, Crucial X6 Portable 1TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB is faster with 3,200 MB/s read speeds compared to 800 MB/s for the Crucial X6 Portable 1TB. That's a 300% speed advantage.
Which has better value, Crucial X6 Portable 1TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB scores higher (8.6 vs 7.6/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

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Crucial X6 Portable 1TB vs Crucial X10 Pro Portable 4TB → SSK PM510 USB4 Portable 1TB vs Crucial X10 Pro Portable 4TB →
Crucial X6 Portable 1TB vs Sabrent Rocket Nano V2 → SSK PM510 USB4 Portable 1TB vs Sabrent Rocket Nano V2 →