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Portable SSDs

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Crucial X6 Portable 4TB vs Lexar SL660 Portable 1TB — Which Portable SSD Is Faster & Better Value?

Compare Crucial X6 Portable 4TB and Lexar SL660 Portable 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 Portable 4TB
8.0/10

A 4TB portable at the X6's budget price is closer to spinning-rust economics than SSD. The 800 MB/s ceiling doesn't matter for the use case — the entire point is capacious portable cold library overflow for PS5, Xbox, or photo archive, not peak throughput.

4TB at budget pricing
PS5/Xbox cold-library friendly
Cool operation
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Our Pick

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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Spec Comparison

Spec
Crucial X6 Portable 4TB
Lexar SL660 Portable 1TB
Read Speed
800 MB/s
2.0 GB/s ✓
Write Speed
800 MB/s
2.0 GB/s ✓
Capacity
4 TB ✓
1 TB
Interface
USB 3.2 Gen 2
USB 3.2 Gen 2x2
Endurance (TBW)
2,400 TB ✓
600 TB
Warranty
3 Years
3 Years
Score
8.0/10
8.1/10 ✓
Total Wins
2 wins
3 wins

Frequently Asked Questions

Which is better, Crucial X6 Portable 4TB or Lexar SL660 Portable 1TB?
The Lexar SL660 Portable 1TB scores 8.1/10 compared to 8.0/10 for the Crucial X6 Portable 4TB. Our expert analysis favors the Lexar SL660 Portable 1TB for its superior speed.
What's the difference between Crucial X6 Portable 4TB and Lexar SL660 Portable 1TB?
The key differences: The Crucial X6 Portable 4TB offers 800 MB/s reads vs 2,000 MB/s for the Lexar SL660 Portable 1TB. Capacity options differ: Crucial X6 Portable 4TB is 4TB while Lexar SL660 Portable 1TB is 1TB. The Crucial X6 Portable 4TB uses USB 3.2 Gen 2 while the Lexar SL660 Portable 1TB uses USB 3.2 Gen 2x2.
Which is faster, Crucial X6 Portable 4TB or Lexar SL660 Portable 1TB?
The Lexar SL660 Portable 1TB is faster with 2,000 MB/s read speeds compared to 800 MB/s for the Crucial X6 Portable 4TB. That's a 150% speed advantage.
Which has better value, Crucial X6 Portable 4TB or Lexar SL660 Portable 1TB?
The Lexar SL660 Portable 1TB scores higher (8.1 vs 8.0/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

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