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External SSDs

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SanDisk Extreme Pro 4TB vs SSK PM510 USB4 1TB

Compare SanDisk Extreme Pro 4TB and SSK PM510 USB4 1TB side by side. Both are 4TB USB 3.2 Gen 2x2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

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 →

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 4TB
SSK PM510 USB4 1TB
Read Speed
2.0 GB/s
3.2 GB/s ✓
Write Speed
2.0 GB/s
2.8 GB/s ✓
Capacity
4 TB ✓
1 TB
Interface
USB 3.2 Gen 2x2
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 4TB or SSK PM510 USB4 1TB?
The SanDisk Extreme Pro 4TB scores 9.2/10 compared to 8.6/10 for the SSK PM510 USB4 1TB. Our expert analysis favors the SanDisk Extreme Pro 4TB for its superior value.
What's the difference between SanDisk Extreme Pro 4TB and SSK PM510 USB4 1TB?
The key differences: The SanDisk Extreme Pro 4TB offers 2,000 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 1TB. Capacity options differ: SanDisk Extreme Pro 4TB is 4TB while SSK PM510 USB4 1TB is 1TB. The SanDisk Extreme Pro 4TB uses USB 3.2 Gen 2x2 while the SSK PM510 USB4 1TB uses USB4.
Which is faster, SanDisk Extreme Pro 4TB or SSK PM510 USB4 1TB?
The SSK PM510 USB4 1TB is faster with 3,200 MB/s read speeds compared to 2,000 MB/s for the SanDisk Extreme Pro 4TB. That's a 60% speed advantage.
Which has better value, SanDisk Extreme Pro 4TB or SSK PM510 USB4 1TB?
The SanDisk Extreme Pro 4TB 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.

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