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Portable SSDs

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SSK PM510 USB4 Portable 1TB vs WD My Passport SSD Portable 4TB

Compare SSK PM510 USB4 Portable 1TB and WD My Passport SSD Portable 4TB side by side. Both are 1TB USB4 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

SSK

SSK PM510 USB4 Portable 1TB
8.6/10

A USB4 portable at enthusiast-grade specs -- 3200 MB/s read over USB4 / Thunderbolt 4 hosts. The PM510 is one of the more affordable USB4 portables, an entry point for video editors who need Thunderbolt-class speeds but do not want to pay LaCie or OWC premium.

USB4 3200 MB/s
Thunderbolt 4 compatible
Aluminum body
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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
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Spec Comparison

Spec
SSK PM510 USB4 Portable 1TB
WD My Passport SSD Portable 4TB
Read Speed
3.2 GB/s ✓
1.1 GB/s
Write Speed
2.8 GB/s ✓
1.0 GB/s
Capacity
1 TB
4 TB ✓
Interface
USB4
USB 3.2 Gen 2
Endurance (TBW)
600 TB
2,400 TB ✓
Warranty
3 Years
3 Years
Score
8.6/10
8.7/10 ✓
Total Wins
2 wins
3 wins

Frequently Asked Questions

Which is better, SSK PM510 USB4 Portable 1TB or WD My Passport SSD Portable 4TB?
The WD My Passport SSD Portable 4TB scores 8.7/10 compared to 8.6/10 for the SSK PM510 USB4 Portable 1TB. Our expert analysis favors the WD My Passport SSD Portable 4TB for its superior value.
What's the difference between SSK PM510 USB4 Portable 1TB and WD My Passport SSD Portable 4TB?
The key differences: The SSK PM510 USB4 Portable 1TB offers 3,200 MB/s reads vs 1,050 MB/s for the WD My Passport SSD Portable 4TB. Capacity options differ: SSK PM510 USB4 Portable 1TB is 1TB while WD My Passport SSD Portable 4TB is 4TB. The SSK PM510 USB4 Portable 1TB uses USB4 while the WD My Passport SSD Portable 4TB uses USB 3.2 Gen 2.
Which is faster, SSK PM510 USB4 Portable 1TB or WD My Passport SSD Portable 4TB?
The SSK PM510 USB4 Portable 1TB is faster with 3,200 MB/s read speeds compared to 1,050 MB/s for the WD My Passport SSD Portable 4TB. That's a 205% speed advantage.
Which has better value, SSK PM510 USB4 Portable 1TB or WD My Passport SSD Portable 4TB?
The WD My Passport SSD Portable 4TB scores higher (8.7 vs 8.6/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

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