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Crucial X6 4TB vs SSK PM510 USB4 1TB

Compare Crucial X6 4TB and SSK PM510 USB4 1TB side by side. Both are 4TB USB 3.2 Gen 2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Crucial

Crucial X6 4TB

8.2/10

A 4TB external at the X6's price is closer to spinning-rust economics than to typical SSD pricing. The 800 MB/s cap doesn't matter when the use case is video archive or photo-library cold storage — this drive is bought for capacity first, speed second.

4TB at budget-friendly price

PS5/Xbox cold-library compatible

Cool-running

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Our Pick

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

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Spec Comparison

Spec

Crucial X6 4TB

SSK PM510 USB4 1TB

Read Speed

800 MB/s

3.2 GB/s ✓

Write Speed

800 MB/s

2.8 GB/s ✓

Capacity

4 TB ✓

1 TB

Interface

USB 3.2 Gen 2

USB4

Endurance (TBW)

2,400 TB ✓

600 TB

Warranty

3 Years

Score

8.2/10

8.6/10 ✓

Total Wins

2 wins

3 wins

Frequently Asked Questions

Which is better, Crucial X6 4TB or SSK PM510 USB4 1TB?

The SSK PM510 USB4 1TB scores 8.6/10 compared to 8.2/10 for the Crucial X6 4TB. Our expert analysis favors the SSK PM510 USB4 1TB for its superior speed.

What's the difference between Crucial X6 4TB and SSK PM510 USB4 1TB?

The key differences: The Crucial X6 4TB offers 800 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 1TB. Capacity options differ: Crucial X6 4TB is 4TB while SSK PM510 USB4 1TB is 1TB. The Crucial X6 4TB uses USB 3.2 Gen 2 while the SSK PM510 USB4 1TB uses USB4.

Which is faster, Crucial X6 4TB or SSK PM510 USB4 1TB?

The SSK PM510 USB4 1TB is faster with 3,200 MB/s read speeds compared to 800 MB/s for the Crucial X6 4TB. That's a 300% speed advantage.

Which has better value, Crucial X6 4TB or SSK PM510 USB4 1TB?

The SSK PM510 USB4 1TB scores higher (8.6 vs 8.2/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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