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External SSDs

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SanDisk Extreme Pro Portable 2TB vs SSK PM510 USB4 1TB — Which External SSD Is Faster & Better Value?

Compare SanDisk Extreme Pro Portable 2TB and SSK PM510 USB4 1TB side by side. Both are 2TB USB 3.2 Gen 2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Our Pick

SanDisk

SanDisk Extreme Pro Portable 2TB
9.2/10

The 2TB Extreme Pro is where SanDisk's ruggedization meets real-world capacity — enough room for a 4K video project, full Lightroom catalog, and Time Machine backup simultaneously. The IP55 shell handles trail dust and light rain where the T7 would not.

IP55 rugged body
5-year warranty
Both cables in box
Check on Amazon →

SSK

SSK PM510 USB4 1TB
8.6/10

AUSB4 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 don't want to pay LaCie or OWC premium.

USB4 3200 MB/s
Thunderbolt 4 compatible
Aluminum body
Check on Amazon →

Spec Comparison

Spec
SanDisk Extreme Pro Portable 2TB
SSK PM510 USB4 1TB
Read Speed
1.1 GB/s
3.2 GB/s ✓
Write Speed
1.0 GB/s
2.8 GB/s ✓
Capacity
2 TB ✓
1 TB
Interface
USB 3.2 Gen 2
USB4
Endurance (TBW)
1,200 TB ✓
600 TB
Warranty
5 Years ✓
3 Years
Score
9.2/10 ✓
8.6/10
Total Wins
4 wins
2 wins

Frequently Asked Questions

Which is better, SanDisk Extreme Pro Portable 2TB or SSK PM510 USB4 1TB?
The SanDisk Extreme Pro Portable 2TB scores 9.2/10 compared to 8.6/10 for the SSK PM510 USB4 1TB. Our expert analysis favors the SanDisk Extreme Pro Portable 2TB for its superior value.
What's the difference between SanDisk Extreme Pro Portable 2TB and SSK PM510 USB4 1TB?
The key differences: The SanDisk Extreme Pro Portable 2TB offers 1,050 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 1TB. Capacity options differ: SanDisk Extreme Pro Portable 2TB is 2TB while SSK PM510 USB4 1TB is 1TB. The SanDisk Extreme Pro Portable 2TB uses USB 3.2 Gen 2 while the SSK PM510 USB4 1TB uses USB4.
Which is faster, SanDisk Extreme Pro Portable 2TB or SSK PM510 USB4 1TB?
The SSK PM510 USB4 1TB is faster with 3,200 MB/s read speeds compared to 1,050 MB/s for the SanDisk Extreme Pro Portable 2TB. That's a 205% speed advantage.
Which has better value, SanDisk Extreme Pro Portable 2TB or SSK PM510 USB4 1TB?
The SanDisk Extreme Pro Portable 2TB scores higher (9.2 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

SanDisk Extreme Pro Portable 2TB vs Samsung T9 2TB → SSK PM510 USB4 1TB vs Samsung T9 2TB →
SanDisk Extreme Pro Portable 2TB vs Samsung T9 Portable SSD → SSK PM510 USB4 1TB vs Samsung T9 Portable SSD →
SanDisk Extreme Pro Portable 2TB vs Crucial X10 Pro 2TB → SSK PM510 USB4 1TB vs Crucial X10 Pro 2TB →
SanDisk Extreme Pro Portable 2TB vs Samsung T7 4TB → SSK PM510 USB4 1TB vs Samsung T7 4TB →