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External SSDs

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Lexar SL660 1TB vs SanDisk Extreme Portable 1TB

Compare Lexar SL660 1TB and SanDisk Extreme Portable 1TB side by side. Both are 1TB USB 3.2 Gen 2x2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

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
Check on Amazon →
Our Pick

SanDisk

SanDisk Extreme Portable 1TB
8.5/10

The non-Pro Extreme is the lower-cost sibling — same 1050 MB/s rated read and IP55 rugged body, but writes top out well below Extreme Pro on sustained workloads. A solid buy when the write-speed gap doesn't matter (game consoles, file transfer, backup) but the rugged rating does.

IP55 rugged body
Same 1050 read as Extreme Pro
Cheaper than Pro by a wide margin
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Spec Comparison

Spec
Lexar SL660 1TB
SanDisk Extreme Portable 1TB
Read Speed
2.0 GB/s ✓
1.1 GB/s
Write Speed
2.0 GB/s ✓
1.0 GB/s
Capacity
1 TB
1 TB
Interface
USB 3.2 Gen 2x2
USB 3.2 Gen 2
Endurance (TBW)
600 TB
600 TB
Warranty
3 Years
3 Years
Score
8.1/10
8.5/10 ✓
Total Wins
2 wins
1 win

Frequently Asked Questions

Which is better, Lexar SL660 1TB or SanDisk Extreme Portable 1TB?
The SanDisk Extreme Portable 1TB scores 8.5/10 compared to 8.1/10 for the Lexar SL660 1TB. Our expert analysis favors the SanDisk Extreme Portable 1TB for its superior value.
What's the difference between Lexar SL660 1TB and SanDisk Extreme Portable 1TB?
The key differences: The Lexar SL660 1TB offers 2,000 MB/s reads vs 1,050 MB/s for the SanDisk Extreme Portable 1TB. Capacity options differ: Lexar SL660 1TB is 1TB while SanDisk Extreme Portable 1TB is 1TB. The Lexar SL660 1TB uses USB 3.2 Gen 2x2 while the SanDisk Extreme Portable 1TB uses USB 3.2 Gen 2.
Which is faster, Lexar SL660 1TB or SanDisk Extreme Portable 1TB?
The Lexar SL660 1TB is faster with 2,000 MB/s read speeds compared to 1,050 MB/s for the SanDisk Extreme Portable 1TB. That's a 90% speed advantage.
Which has better value, Lexar SL660 1TB or SanDisk Extreme Portable 1TB?
The SanDisk Extreme Portable 1TB scores higher (8.5 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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