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Portable SSDs

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Lexar SL660 Portable 1TB vs SSK PM510 USB4 Portable 1TB

Compare Lexar SL660 Portable 1TB and SSK PM510 USB4 Portable 1TB side by side. Both are 1TB USB 3.2 Gen 2x2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Lexar

Lexar SL660 Portable 1TB
8.1/10

A 1TB Gen 2x2 portable with an aluminum body and an RGB-lit Logo -- the RGB is divisive but the performance is real. Build quality distinguishes the SL660 from cheaper Gen 2x2 peers like the Patriot Evlvr.

Gen 2x2 2000/2000 MB/s
Aluminum body
3-year warranty
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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
Lexar SL660 Portable 1TB
SSK PM510 USB4 Portable 1TB
Read Speed
2.0 GB/s
3.2 GB/s ✓
Write Speed
2.0 GB/s
2.8 GB/s ✓
Capacity
1 TB
1 TB
Interface
USB 3.2 Gen 2x2
USB4
Endurance (TBW)
600 TB
600 TB
Warranty
3 Years
3 Years
Score
8.1/10
8.6/10 ✓
Total Wins
0 wins
3 wins

Frequently Asked Questions

Which is better, Lexar SL660 Portable 1TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB scores 8.6/10 compared to 8.1/10 for the Lexar SL660 Portable 1TB. Our expert analysis favors the SSK PM510 USB4 Portable 1TB for its superior speed.
What's the difference between Lexar SL660 Portable 1TB and SSK PM510 USB4 Portable 1TB?
The key differences: The Lexar SL660 Portable 1TB offers 2,000 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 Portable 1TB. Capacity options differ: Lexar SL660 Portable 1TB is 1TB while SSK PM510 USB4 Portable 1TB is 1TB. The Lexar SL660 Portable 1TB uses USB 3.2 Gen 2x2 while the SSK PM510 USB4 Portable 1TB uses USB4.
Which is faster, Lexar SL660 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 2,000 MB/s for the Lexar SL660 Portable 1TB. That's a 60% speed advantage.
Which has better value, Lexar SL660 Portable 1TB or SSK PM510 USB4 Portable 1TB?
The SSK PM510 USB4 Portable 1TB scores higher (8.6 vs 8.1/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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