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Portable SSDs

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Crucial X9 Pro vs Lexar SL660 Portable 2TB — Which Portable SSD Is Faster & Better Value?

Compare Crucial X9 Pro and Lexar SL660 Portable 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.

Our Pick

Crucial

Crucial X9 Pro
8.9/10

Ultra-compact pro-grade portable SSD. Pocket-sized at just 65g. Ideal for mobile professionals.

Extremely compact and lightweight (65g)
IP55 water and dust resistance
Drop-proof up to 2 meters
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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 X9 Pro
Lexar SL660 Portable 2TB
Read Speed
1.1 GB/s
2.0 GB/s ✓
Write Speed
1.0 GB/s
2.0 GB/s ✓
Capacity
1 TB
2 TB ✓
Interface
USB 3.2 Gen 2
USB 3.2 Gen 2x2
Endurance (TBW)
440 TB
1,200 TB ✓
Warranty
3 Years
3 Years
Score
8.9/10 ✓
8.2/10
Total Wins
1 win
4 wins

Frequently Asked Questions

Which is better, Crucial X9 Pro or Lexar SL660 Portable 2TB?
The Crucial X9 Pro scores 8.9/10 compared to 8.2/10 for the Lexar SL660 Portable 2TB. Our expert analysis favors the Crucial X9 Pro for its superior value.
What's the difference between Crucial X9 Pro and Lexar SL660 Portable 2TB?
The key differences: The Crucial X9 Pro offers 1,050 MB/s reads vs 2,000 MB/s for the Lexar SL660 Portable 2TB. Capacity options differ: Crucial X9 Pro is 1TB while Lexar SL660 Portable 2TB is 2TB. The Crucial X9 Pro uses USB 3.2 Gen 2 while the Lexar SL660 Portable 2TB uses USB 3.2 Gen 2x2.
Which is faster, Crucial X9 Pro or Lexar SL660 Portable 2TB?
The Lexar SL660 Portable 2TB is faster with 2,000 MB/s read speeds compared to 1,050 MB/s for the Crucial X9 Pro. That's a 90% speed advantage.
Which has better value, Crucial X9 Pro or Lexar SL660 Portable 2TB?
The Crucial X9 Pro scores higher (8.9 vs 8.2/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

Crucial X9 Pro vs Samsung T9 Portable SSD → Lexar SL660 Portable 2TB vs Samsung T9 Portable SSD →
Crucial X9 Pro vs Samsung T9 Portable 4TB → Lexar SL660 Portable 2TB vs Samsung T9 Portable 4TB →
Crucial X9 Pro vs Crucial X10 Pro Portable 4TB → Lexar SL660 Portable 2TB vs Crucial X10 Pro Portable 4TB →
Crucial X9 Pro vs Sabrent Rocket Nano V2 → Lexar SL660 Portable 2TB vs Sabrent Rocket Nano V2 →