Skip to main content
Portable SSDs

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 Portable 2TB vs WD My Passport SSD Portable 4TB

Compare Lexar SL660 Portable 2TB and WD My Passport SSD Portable 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 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
Check on Amazon →
Our Pick

Western Digital

WD My Passport SSD Portable 4TB
8.7/10

A 4TB My Passport SSD portable — same physical package as the 1TB/2TB but with the 4TB die stack. The biggest single-portable WD ships and one of the few 4TB portable SSDs at retail, period. Compares closely with the Samsung T7 4TB.

4TB slim form factor
2400 TBW endurance
AES hardware encryption
Check on Amazon →

Spec Comparison

Spec
Lexar SL660 Portable 2TB
WD My Passport SSD Portable 4TB
Read Speed
2.0 GB/s ✓
1.1 GB/s
Write Speed
2.0 GB/s ✓
1.0 GB/s
Capacity
2 TB
4 TB ✓
Interface
USB 3.2 Gen 2x2
USB 3.2 Gen 2
Endurance (TBW)
1,200 TB
2,400 TB ✓
Warranty
3 Years
3 Years
Score
8.2/10
8.7/10 ✓
Total Wins
2 wins
3 wins

Frequently Asked Questions

Which is better, Lexar SL660 Portable 2TB or WD My Passport SSD Portable 4TB?
The WD My Passport SSD Portable 4TB scores 8.7/10 compared to 8.2/10 for the Lexar SL660 Portable 2TB. Our expert analysis favors the WD My Passport SSD Portable 4TB for its superior value.
What's the difference between Lexar SL660 Portable 2TB and WD My Passport SSD Portable 4TB?
The key differences: The Lexar SL660 Portable 2TB offers 2,000 MB/s reads vs 1,050 MB/s for the WD My Passport SSD Portable 4TB. Capacity options differ: Lexar SL660 Portable 2TB is 2TB while WD My Passport SSD Portable 4TB is 4TB. The Lexar SL660 Portable 2TB uses USB 3.2 Gen 2x2 while the WD My Passport SSD Portable 4TB uses USB 3.2 Gen 2.
Which is faster, Lexar SL660 Portable 2TB or WD My Passport SSD Portable 4TB?
The Lexar SL660 Portable 2TB is faster with 2,000 MB/s read speeds compared to 1,050 MB/s for the WD My Passport SSD Portable 4TB. That's a 90% speed advantage.
Which has better value, Lexar SL660 Portable 2TB or WD My Passport SSD Portable 4TB?
The WD My Passport SSD Portable 4TB scores higher (8.7 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 Portable 2TB vs Samsung T9 Portable SSD → WD My Passport SSD Portable 4TB vs Samsung T9 Portable SSD →
Lexar SL660 Portable 2TB vs Samsung T9 Portable 4TB → WD My Passport SSD Portable 4TB vs Samsung T9 Portable 4TB →
Lexar SL660 Portable 2TB vs Crucial X10 Pro Portable 4TB → WD My Passport SSD Portable 4TB vs Crucial X10 Pro Portable 4TB →
Lexar SL660 Portable 2TB vs Sabrent Rocket Nano V2 → WD My Passport SSD Portable 4TB vs Sabrent Rocket Nano V2 →