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Portable SSDs

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Crucial X9 Pro Portable 2TB vs Lexar SL660 Portable 1TB

Compare Crucial X9 Pro Portable 2TB and Lexar SL660 Portable 1TB 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.

Our Pick

Crucial

Crucial X9 Pro Portable 2TB
9.0/10

The 2TB X9 Pro doubles the cache budget over the 1TB. Real TLC NAND and 5-year warranty gives Crucial's premium portable line a longer-lived write endurance than consumer QLC alternatives. The right buy for editors who want a working drive rather than a backup drive.

Real TLC NAND
5-year warranty
1200 TBW endurance
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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 X9 Pro Portable 2TB
Lexar SL660 Portable 1TB
Read Speed
1.1 GB/s
2.0 GB/s ✓
Write Speed
950 MB/s
2.0 GB/s ✓
Capacity
2 TB ✓
1 TB
Interface
USB 3.2 Gen 2
USB 3.2 Gen 2x2
Endurance (TBW)
1,200 TB ✓
600 TB
Warranty
5 Years ✓
3 Years
Score
9.0/10 ✓
8.1/10
Total Wins
4 wins
2 wins

Frequently Asked Questions

Which is better, Crucial X9 Pro Portable 2TB or Lexar SL660 Portable 1TB?
The Crucial X9 Pro Portable 2TB scores 9.0/10 compared to 8.1/10 for the Lexar SL660 Portable 1TB. Our expert analysis favors the Crucial X9 Pro Portable 2TB for its superior value.
What's the difference between Crucial X9 Pro Portable 2TB and Lexar SL660 Portable 1TB?
The key differences: The Crucial X9 Pro Portable 2TB offers 1,050 MB/s reads vs 2,000 MB/s for the Lexar SL660 Portable 1TB. Capacity options differ: Crucial X9 Pro Portable 2TB is 2TB while Lexar SL660 Portable 1TB is 1TB. The Crucial X9 Pro Portable 2TB uses USB 3.2 Gen 2 while the Lexar SL660 Portable 1TB uses USB 3.2 Gen 2x2.
Which is faster, Crucial X9 Pro Portable 2TB or Lexar SL660 Portable 1TB?
The Lexar SL660 Portable 1TB is faster with 2,000 MB/s read speeds compared to 1,050 MB/s for the Crucial X9 Pro Portable 2TB. That's a 90% speed advantage.
Which has better value, Crucial X9 Pro Portable 2TB or Lexar SL660 Portable 1TB?
The Crucial X9 Pro Portable 2TB scores higher (9.0 vs 8.1/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

Crucial X9 Pro Portable 2TB vs Samsung T9 Portable SSD → Lexar SL660 Portable 1TB vs Samsung T9 Portable SSD →
Crucial X9 Pro Portable 2TB vs Samsung T9 Portable 4TB → Lexar SL660 Portable 1TB vs Samsung T9 Portable 4TB →
Crucial X9 Pro Portable 2TB vs Crucial X10 Pro Portable 4TB → Lexar SL660 Portable 1TB vs Crucial X10 Pro Portable 4TB →
Crucial X9 Pro Portable 2TB vs Sabrent Rocket Nano V2 → Lexar SL660 Portable 1TB vs Sabrent Rocket Nano V2 →