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Portable SSDs

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Crucial X6 Portable 2TB vs Lexar SL660 Portable 2TB — Which Portable SSD Is Faster & Better Value?

Compare Crucial X6 Portable 2TB and Lexar SL660 Portable 2TB side by side. Both are 2TB 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 2TB
7.8/10

A 2TB budget portable SSD from Crucial — the X6 line consistently comes in cheaper per-TB than the T7 family. The 2TB keeps the 800 MB/s cap but the larger SLC cache holds the rate longer before slowing.

2TB budget Gen 2
800 MB/s read
PS5/Xbox cold-library compatible
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Our Pick

Lexar

Lexar SL660 Portable 2TB
8.2/10

The 2TB SL660 doubles SLC cache budget over the 1TB. RGB and aluminum body preserved -- a competitive Gen 2x2 2TB at moderate pricing, comparable with the Kingston XS2000 2TB and Patriot Evlvr 2TB.

Gen 2x2 2000 MB/s
2TB storage
Aluminum body
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Spec Comparison

Spec
Crucial X6 Portable 2TB
Lexar SL660 Portable 2TB
Read Speed
800 MB/s
2.0 GB/s ✓
Write Speed
800 MB/s
2.0 GB/s ✓
Capacity
2 TB
2 TB
Interface
USB 3.2 Gen 2
USB 3.2 Gen 2x2
Endurance (TBW)
1,200 TB
1,200 TB
Warranty
3 Years
3 Years
Score
7.8/10
8.2/10 ✓
Total Wins
0 wins
3 wins

Frequently Asked Questions

Which is better, Crucial X6 Portable 2TB or Lexar SL660 Portable 2TB?
The Lexar SL660 Portable 2TB scores 8.2/10 compared to 7.8/10 for the Crucial X6 Portable 2TB. Our expert analysis favors the Lexar SL660 Portable 2TB for its superior speed.
What's the difference between Crucial X6 Portable 2TB and Lexar SL660 Portable 2TB?
The key differences: The Crucial X6 Portable 2TB offers 800 MB/s reads vs 2,000 MB/s for the Lexar SL660 Portable 2TB. Capacity options differ: Crucial X6 Portable 2TB is 2TB while Lexar SL660 Portable 2TB is 2TB. The Crucial X6 Portable 2TB uses USB 3.2 Gen 2 while the Lexar SL660 Portable 2TB uses USB 3.2 Gen 2x2.
Which is faster, Crucial X6 Portable 2TB or Lexar SL660 Portable 2TB?
The Lexar SL660 Portable 2TB is faster with 2,000 MB/s read speeds compared to 800 MB/s for the Crucial X6 Portable 2TB. That's a 150% speed advantage.
Which has better value, Crucial X6 Portable 2TB or Lexar SL660 Portable 2TB?
The Lexar SL660 Portable 2TB scores higher (8.2 vs 7.8/10), 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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Crucial X6 Portable 2TB vs Crucial X10 Pro Portable 4TB → Lexar SL660 Portable 2TB vs Crucial X10 Pro Portable 4TB →
Crucial X6 Portable 2TB vs Sabrent Rocket Nano V2 → Lexar SL660 Portable 2TB vs Sabrent Rocket Nano V2 →