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Crucial X6 4TB vs Lexar SL660 1TB

Compare Crucial X6 4TB and Lexar SL660 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.

Our Pick

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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Lexar

Lexar SL660 1TB

8.1/10

A premium 2000 MB/s Gen 2x2 portable with an aluminum body and an RGB-lit Logo. The RGB is a divisive feature but the performance is real, and the build quality distinguishes it 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 4TB

Lexar SL660 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

Score

8.2/10 ✓

8.1/10

Total Wins

3 wins

2 wins

Frequently Asked Questions

Which is better, Crucial X6 4TB or Lexar SL660 1TB?

The Crucial X6 4TB scores 8.2/10 compared to 8.1/10 for the Lexar SL660 1TB. Our expert analysis favors the Crucial X6 4TB for its superior value.

What's the difference between Crucial X6 4TB and Lexar SL660 1TB?

The key differences: The Crucial X6 4TB offers 800 MB/s reads vs 2,000 MB/s for the Lexar SL660 1TB. Capacity options differ: Crucial X6 4TB is 4TB while Lexar SL660 1TB is 1TB. The Crucial X6 4TB uses USB 3.2 Gen 2 while the Lexar SL660 1TB uses USB 3.2 Gen 2x2.

Which is faster, Crucial X6 4TB or Lexar SL660 1TB?

The Lexar SL660 1TB is faster with 2,000 MB/s read speeds compared to 800 MB/s for the Crucial X6 4TB. That's a 150% speed advantage.

Which has better value, Crucial X6 4TB or Lexar SL660 1TB?

The Crucial X6 4TB scores higher (8.2 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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