As an Amazon Associate I earn from qualifying purchases. We may earn a commission from qualifying purchases made through links on this page. Prices and availability are subject to change. We are reader-supported and independent — our rankings are based on an objective scoring rubric, not sponsorship.

Lexar SL660 2TB vs SanDisk Extreme Pro 4TB

Compare Lexar SL660 2TB and SanDisk Extreme Pro 4TB side by side. Both are 2TB USB 3.2 Gen 2x2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

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

Check on Amazon →

Our Pick

SanDisk

SanDisk Extreme Pro 4TB

9.2/10

Extreme 4TB portable SSD with 2000MB/s speeds and IP55 rating. The ultimate high-capacity drive for professionals on the go.

4TB capacity with 2000MB/s read and write

IP55 water and dust resistance

5-year warranty

Check on Amazon →

Spec Comparison

Spec

Lexar SL660 2TB

SanDisk Extreme Pro 4TB

Read Speed

2.0 GB/s

Write Speed

2.0 GB/s

Capacity

2 TB

4 TB ✓

Interface

USB 3.2 Gen 2x2

Endurance (TBW)

1,200 TB

Warranty

3 Years

5 Years ✓

Score

8.2/10

9.2/10 ✓

Total Wins

0 wins

3 wins

Frequently Asked Questions

Which is better, Lexar SL660 2TB or SanDisk Extreme Pro 4TB?

The SanDisk Extreme Pro 4TB scores 9.2/10 compared to 8.2/10 for the Lexar SL660 2TB. Our expert analysis favors the SanDisk Extreme Pro 4TB for its superior value.

What's the difference between Lexar SL660 2TB and SanDisk Extreme Pro 4TB?

The key differences: The Lexar SL660 2TB offers 2,000 MB/s reads vs 2,000 MB/s for the SanDisk Extreme Pro 4TB. Capacity options differ: Lexar SL660 2TB is 2TB while SanDisk Extreme Pro 4TB is 4TB. The Lexar SL660 2TB uses USB 3.2 Gen 2x2 while the SanDisk Extreme Pro 4TB uses USB 3.2 Gen 2x2.

Which is faster, Lexar SL660 2TB or SanDisk Extreme Pro 4TB?

Both drives offer the same 2,000 MB/s read speeds.

Which has better value, Lexar SL660 2TB or SanDisk Extreme Pro 4TB?

The SanDisk Extreme Pro 4TB scores higher (9.2 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

Lexar SL660 2TB vs Samsung T9 2TB → SanDisk Extreme Pro 4TB vs Samsung T9 2TB →

Lexar SL660 2TB vs Samsung T9 Portable SSD → SanDisk Extreme Pro 4TB vs Samsung T9 Portable SSD →

Lexar SL660 2TB vs Crucial X10 Pro 2TB → SanDisk Extreme Pro 4TB vs Crucial X10 Pro 2TB →

Lexar SL660 2TB vs Samsung T7 4TB → SanDisk Extreme Pro 4TB vs Samsung T7 4TB →