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External SSDs

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LaCie Rugged SSD Pro 4TB vs SSK PM510 USB4 1TB

Compare LaCie Rugged SSD Pro 4TB and SSK PM510 USB4 1TB side by side. Both are 4TB Thunderbolt 3 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Our Pick

LaCie

LaCie Rugged SSD Pro 4TB
9.2/10

A 4TBThunderbolt 3 portable — uniquely huge for this speed tier. The Rugged SSD Pro 4TB fills a slot nothing else really does: 4TB of fast external storage that's actually rugged, not just claimed to be.

Thunderbolt 3 + 4TB
IP67 + 3m drop + 1-ton crush
5-year Rescue
Check on Amazon →

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
Check on Amazon →

Spec Comparison

Spec
LaCie Rugged SSD Pro 4TB
SSK PM510 USB4 1TB
Read Speed
2.7 GB/s
3.2 GB/s ✓
Write Speed
1.9 GB/s
2.8 GB/s ✓
Capacity
4 TB ✓
1 TB
Interface
Thunderbolt 3
USB4
Endurance (TBW)
2,400 TB ✓
600 TB
Warranty
5 Years ✓
3 Years
Score
9.2/10 ✓
8.6/10
Total Wins
4 wins
2 wins

Frequently Asked Questions

Which is better, LaCie Rugged SSD Pro 4TB or SSK PM510 USB4 1TB?
The LaCie Rugged SSD Pro 4TB scores 9.2/10 compared to 8.6/10 for the SSK PM510 USB4 1TB. Our expert analysis favors the LaCie Rugged SSD Pro 4TB for its superior value.
What's the difference between LaCie Rugged SSD Pro 4TB and SSK PM510 USB4 1TB?
The key differences: The LaCie Rugged SSD Pro 4TB offers 2,700 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 1TB. Capacity options differ: LaCie Rugged SSD Pro 4TB is 4TB while SSK PM510 USB4 1TB is 1TB. The LaCie Rugged SSD Pro 4TB uses Thunderbolt 3 while the SSK PM510 USB4 1TB uses USB4.
Which is faster, LaCie Rugged SSD Pro 4TB or SSK PM510 USB4 1TB?
The SSK PM510 USB4 1TB is faster with 3,200 MB/s read speeds compared to 2,700 MB/s for the LaCie Rugged SSD Pro 4TB. That's a 19% speed advantage.
Which has better value, LaCie Rugged SSD Pro 4TB or SSK PM510 USB4 1TB?
The LaCie Rugged SSD Pro 4TB scores higher (9.2 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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