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Portable SSDs

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Crucial X6 Portable 2TB vs SSK PM510 USB4 Portable 1TB — Which Portable SSD Is Faster & Better Value?

Compare Crucial X6 Portable 2TB and SSK PM510 USB4 Portable 1TB side by side. Both are 2TB 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 2TB
7.8/10

A 2TB budget portable SSD from Crucial — the X6 line consistently comes in cheaper per-TB than the T7 family. The 2TB keeps the 800 MB/s cap but the larger SLC cache holds the rate longer before slowing.

2TB budget Gen 2
800 MB/s read
PS5/Xbox cold-library compatible
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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 2TB
SSK PM510 USB4 Portable 1TB
Read Speed
800 MB/s
3.2 GB/s ✓
Write Speed
800 MB/s
2.8 GB/s ✓
Capacity
2 TB ✓
1 TB
Interface
USB 3.2 Gen 2
USB4
Endurance (TBW)
1,200 TB ✓
600 TB
Warranty
3 Years
3 Years
Score
7.8/10
8.6/10 ✓
Total Wins
2 wins
3 wins

Frequently Asked Questions

Which is better, Crucial X6 Portable 2TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB scores 8.6/10 compared to 7.8/10 for the Crucial X6 Portable 2TB. Our expert analysis favors the SSK PM510 USB4 Portable 1TB for its superior speed.
What's the difference between Crucial X6 Portable 2TB and SSK PM510 USB4 Portable 1TB?
The key differences: The Crucial X6 Portable 2TB offers 800 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 Portable 1TB. Capacity options differ: Crucial X6 Portable 2TB is 2TB while SSK PM510 USB4 Portable 1TB is 1TB. The Crucial X6 Portable 2TB uses USB 3.2 Gen 2 while the SSK PM510 USB4 Portable 1TB uses USB4.
Which is faster, Crucial X6 Portable 2TB 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 2TB. That's a 300% speed advantage.
Which has better value, Crucial X6 Portable 2TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB scores higher (8.6 vs 7.8/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

Crucial X6 Portable 2TB vs Samsung T9 Portable SSD → SSK PM510 USB4 Portable 1TB vs Samsung T9 Portable SSD →
Crucial X6 Portable 2TB vs Samsung T9 Portable 4TB → SSK PM510 USB4 Portable 1TB vs Samsung T9 Portable 4TB →
Crucial X6 Portable 2TB vs Crucial X10 Pro Portable 4TB → SSK PM510 USB4 Portable 1TB vs Crucial X10 Pro Portable 4TB →
Crucial X6 Portable 2TB vs Sabrent Rocket Nano V2 → SSK PM510 USB4 Portable 1TB vs Sabrent Rocket Nano V2 →