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External SSDs

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LaCie Rugged SSD Pro 4TB vs Lexar SL100 Pro 1TB — Which External SSD Is Faster & Better Value?

Compare LaCie Rugged SSD Pro 4TB and Lexar SL100 Pro 1TB side by side. Both are 4TB Thunderbolt 3 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Our Pick

LaCie

LaCie Rugged SSD Pro 4TB
9.2/10

A 4TBThunderbolt 3 portable — uniquely huge for this speed tier. The Rugged SSD Pro 4TB fills a slot nothing else really does: 4TB of fast external storage that's actually rugged, not just claimed to be.

Thunderbolt 3 + 4TB
IP67 + 3m drop + 1-ton crush
5-year Rescue
Check on Amazon →

Lexar

Lexar SL100 Pro 1TB
7.5/10

A 950 MB/s Gen 2 portable in a brushed-aluminum case the size of a credit card. The SL100 Pro is one of the smallest 1TB Gen 2 SSDs at retail — buy it for the form factor, not the rated speed (which undershoots the Gen 2 ceiling).

Brushed-aluminum case
950 MB/s read
Tiny credit-card footprint
Check on Amazon →

Spec Comparison

Spec
LaCie Rugged SSD Pro 4TB
Lexar SL100 Pro 1TB
Read Speed
2.7 GB/s ✓
950 MB/s
Write Speed
1.9 GB/s ✓
950 MB/s
Capacity
4 TB ✓
1 TB
Interface
Thunderbolt 3
USB 3.2 Gen 2
Endurance (TBW)
2,400 TB ✓
600 TB
Warranty
5 Years ✓
3 Years
Score
9.2/10 ✓
7.5/10
Total Wins
6 wins
0 wins

Frequently Asked Questions

Which is better, LaCie Rugged SSD Pro 4TB or Lexar SL100 Pro 1TB?
The LaCie Rugged SSD Pro 4TB scores 9.2/10 compared to 7.5/10 for the Lexar SL100 Pro 1TB. Our expert analysis favors the LaCie Rugged SSD Pro 4TB for its superior speed.
What's the difference between LaCie Rugged SSD Pro 4TB and Lexar SL100 Pro 1TB?
The key differences: The LaCie Rugged SSD Pro 4TB offers 2,700 MB/s reads vs 950 MB/s for the Lexar SL100 Pro 1TB. Capacity options differ: LaCie Rugged SSD Pro 4TB is 4TB while Lexar SL100 Pro 1TB is 1TB. The LaCie Rugged SSD Pro 4TB uses Thunderbolt 3 while the Lexar SL100 Pro 1TB uses USB 3.2 Gen 2.
Which is faster, LaCie Rugged SSD Pro 4TB or Lexar SL100 Pro 1TB?
The LaCie Rugged SSD Pro 4TB is faster with 2,700 MB/s read speeds compared to 950 MB/s for the Lexar SL100 Pro 1TB. That's a 184% speed advantage.
Which has better value, LaCie Rugged SSD Pro 4TB or Lexar SL100 Pro 1TB?
The LaCie Rugged SSD Pro 4TB scores higher (9.2 vs 7.5/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

LaCie Rugged SSD Pro 4TB vs Samsung T9 2TB → Lexar SL100 Pro 1TB vs Samsung T9 2TB →
LaCie Rugged SSD Pro 4TB vs Samsung T9 Portable SSD → Lexar SL100 Pro 1TB vs Samsung T9 Portable SSD →
LaCie Rugged SSD Pro 4TB vs Crucial X10 Pro 2TB → Lexar SL100 Pro 1TB vs Crucial X10 Pro 2TB →
LaCie Rugged SSD Pro 4TB vs Samsung T7 4TB → Lexar SL100 Pro 1TB vs Samsung T7 4TB →