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Portable SSDs

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Crucial X8 Portable 1TB vs SSK PM510 USB4 Portable 1TB — Which Portable SSD Is Faster & Better Value?

Compare Crucial X8 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 X8 Portable 1TB
8.3/10

The X8 is the previous-gen Crucial premium portable — superseded by the X9 Pro but often available at discounts. Same 1050/1000 MB/s, aluminum unibody, but a 3-year warranty. Worth buying if the sale price beats the X9 Pro by a meaningful margin.

1050/1000 MB/s
Anodized aluminum body
Often on clearance
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
Check on Amazon →

Spec Comparison

Spec
Crucial X8 Portable 1TB
SSK PM510 USB4 Portable 1TB
Read Speed
1.1 GB/s
3.2 GB/s ✓
Write Speed
1.0 GB/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
8.3/10
8.6/10 ✓
Total Wins
0 wins
3 wins

Frequently Asked Questions

Which is better, Crucial X8 Portable 1TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB scores 8.6/10 compared to 8.3/10 for the Crucial X8 Portable 1TB. Our expert analysis favors the SSK PM510 USB4 Portable 1TB for its superior speed.
What's the difference between Crucial X8 Portable 1TB and SSK PM510 USB4 Portable 1TB?
The key differences: The Crucial X8 Portable 1TB offers 1,050 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 Portable 1TB. Capacity options differ: Crucial X8 Portable 1TB is 1TB while SSK PM510 USB4 Portable 1TB is 1TB. The Crucial X8 Portable 1TB uses USB 3.2 Gen 2 while the SSK PM510 USB4 Portable 1TB uses USB4.
Which is faster, Crucial X8 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 1,050 MB/s for the Crucial X8 Portable 1TB. That's a 205% speed advantage.
Which has better value, Crucial X8 Portable 1TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB scores higher (8.6 vs 8.3/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

Crucial X8 Portable 1TB vs Samsung T9 Portable SSD → SSK PM510 USB4 Portable 1TB vs Samsung T9 Portable SSD →
Crucial X8 Portable 1TB vs Samsung T9 Portable 4TB → SSK PM510 USB4 Portable 1TB vs Samsung T9 Portable 4TB →
Crucial X8 Portable 1TB vs Crucial X10 Pro Portable 4TB → SSK PM510 USB4 Portable 1TB vs Crucial X10 Pro Portable 4TB →
Crucial X8 Portable 1TB vs Sabrent Rocket Nano V2 → SSK PM510 USB4 Portable 1TB vs Sabrent Rocket Nano V2 →