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Portable SSDs

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Crucial X9 Pro vs SSK PM510 USB4 Portable 1TB

Compare Crucial X9 Pro 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.

Our Pick

Crucial

Crucial X9 Pro
8.9/10

Ultra-compact pro-grade portable SSD. Pocket-sized at just 65g. Ideal for mobile professionals.

Extremely compact and lightweight (65g)
IP55 water and dust resistance
Drop-proof up to 2 meters
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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 X9 Pro
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)
440 TB
600 TB ✓
Warranty
3 Years
3 Years
Score
8.9/10 ✓
8.6/10
Total Wins
2 wins
3 wins

Frequently Asked Questions

Which is better, Crucial X9 Pro or SSK PM510 USB4 Portable 1TB?
The Crucial X9 Pro scores 8.9/10 compared to 8.6/10 for the SSK PM510 USB4 Portable 1TB. Our expert analysis favors the Crucial X9 Pro for its superior value.
What's the difference between Crucial X9 Pro and SSK PM510 USB4 Portable 1TB?
The key differences: The Crucial X9 Pro offers 1,050 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 Portable 1TB. Capacity options differ: Crucial X9 Pro is 1TB while SSK PM510 USB4 Portable 1TB is 1TB. The Crucial X9 Pro uses USB 3.2 Gen 2 while the SSK PM510 USB4 Portable 1TB uses USB4.
Which is faster, Crucial X9 Pro 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 X9 Pro. That's a 205% speed advantage.
Which has better value, Crucial X9 Pro or SSK PM510 USB4 Portable 1TB?
The Crucial X9 Pro 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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