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Portable SSDs

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Lexar SL660 Portable 1TB vs SanDisk Extreme Pro Portable 4TB

Compare Lexar SL660 Portable 1TB and SanDisk Extreme Pro Portable 4TB 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 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
Check on Amazon →
Our Pick

SanDisk

SanDisk Extreme Pro Portable 4TB
9.3/10

The 4TB Extreme Pro is the largest portable SSD in SanDisk's ruggedized line and a direct competitor to the Samsung T7 Shield 4TB. The 5-year warranty plus IP55 rubber armor are distinguishing factors vs other 4TB portable SSDs — most peers only offer 3.

4TB @ IP55 rugged
5-year warranty
Both cables in box
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Spec Comparison

Spec
Lexar SL660 Portable 1TB
SanDisk Extreme Pro Portable 4TB
Read Speed
2.0 GB/s ✓
1.1 GB/s
Write Speed
2.0 GB/s ✓
1.0 GB/s
Capacity
1 TB
4 TB ✓
Interface
USB 3.2 Gen 2x2
USB 3.2 Gen 2
Endurance (TBW)
600 TB
2,400 TB ✓
Warranty
3 Years
5 Years ✓
Score
8.1/10
9.3/10 ✓
Total Wins
2 wins
4 wins

Frequently Asked Questions

Which is better, Lexar SL660 Portable 1TB or SanDisk Extreme Pro Portable 4TB?
The SanDisk Extreme Pro Portable 4TB scores 9.3/10 compared to 8.1/10 for the Lexar SL660 Portable 1TB. Our expert analysis favors the SanDisk Extreme Pro Portable 4TB for its superior value.
What's the difference between Lexar SL660 Portable 1TB and SanDisk Extreme Pro Portable 4TB?
The key differences: The Lexar SL660 Portable 1TB offers 2,000 MB/s reads vs 1,050 MB/s for the SanDisk Extreme Pro Portable 4TB. Capacity options differ: Lexar SL660 Portable 1TB is 1TB while SanDisk Extreme Pro Portable 4TB is 4TB. The Lexar SL660 Portable 1TB uses USB 3.2 Gen 2x2 while the SanDisk Extreme Pro Portable 4TB uses USB 3.2 Gen 2.
Which is faster, Lexar SL660 Portable 1TB or SanDisk Extreme Pro Portable 4TB?
The Lexar SL660 Portable 1TB is faster with 2,000 MB/s read speeds compared to 1,050 MB/s for the SanDisk Extreme Pro Portable 4TB. That's a 90% speed advantage.
Which has better value, Lexar SL660 Portable 1TB or SanDisk Extreme Pro Portable 4TB?
The SanDisk Extreme Pro Portable 4TB scores higher (9.3 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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