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External SSDs

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Lexar SL100 Pro 1TB vs Lexar SL660 2TB

Compare Lexar SL100 Pro 1TB and Lexar SL660 2TB side by side. Both are 1TB USB 3.2 Gen 2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Lexar

Lexar SL100 Pro 1TB
7.5/10

A 950 MB/s Gen 2 portable in a brushed-aluminum case the size of a credit card. The SL100 Pro is one of the smallest 1TB Gen 2 SSDs at retail — buy it for the form factor, not the rated speed (which undershoots the Gen 2 ceiling).

Brushed-aluminum case
950 MB/s read
Tiny credit-card footprint
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Our Pick

Lexar

Lexar SL660 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. Worth comparing 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
Lexar SL100 Pro 1TB
Lexar SL660 2TB
Read Speed
950 MB/s
2.0 GB/s ✓
Write Speed
950 MB/s
2.0 GB/s ✓
Capacity
1 TB
2 TB ✓
Interface
USB 3.2 Gen 2
USB 3.2 Gen 2x2
Endurance (TBW)
600 TB
1,200 TB ✓
Warranty
3 Years
3 Years
Score
7.5/10
8.2/10 ✓
Total Wins
0 wins
5 wins

Frequently Asked Questions

Which is better, Lexar SL100 Pro 1TB or Lexar SL660 2TB?
The Lexar SL660 2TB scores 8.2/10 compared to 7.5/10 for the Lexar SL100 Pro 1TB. Our expert analysis favors the Lexar SL660 2TB for its superior speed.
What's the difference between Lexar SL100 Pro 1TB and Lexar SL660 2TB?
The key differences: The Lexar SL100 Pro 1TB offers 950 MB/s reads vs 2,000 MB/s for the Lexar SL660 2TB. Capacity options differ: Lexar SL100 Pro 1TB is 1TB while Lexar SL660 2TB is 2TB. The Lexar SL100 Pro 1TB uses USB 3.2 Gen 2 while the Lexar SL660 2TB uses USB 3.2 Gen 2x2.
Which is faster, Lexar SL100 Pro 1TB or Lexar SL660 2TB?
The Lexar SL660 2TB is faster with 2,000 MB/s read speeds compared to 950 MB/s for the Lexar SL100 Pro 1TB. That's a 111% speed advantage.
Which has better value, Lexar SL100 Pro 1TB or Lexar SL660 2TB?
The Lexar SL660 2TB scores higher (8.2 vs 7.5/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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Lexar SL100 Pro 1TB vs Samsung T9 2TB → Lexar SL660 2TB vs Samsung T9 2TB →
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Lexar SL100 Pro 1TB vs Samsung T7 4TB → Lexar SL660 2TB vs Samsung T7 4TB →