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

Compare SanDisk Extreme Portable 2TB and SSK PM510 USB4 Portable 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.

SanDisk

SanDisk Extreme Portable 2TB

8.6/10

A 2TB IP55 rugged portable — the budget sibling of the Extreme Pro 2TB. Same IP55 body and 1050 MB/s read, just dropped to a 3-year warranty and slower sustained writes on long transfers. Worth it if your use case is backup and console library overflow rather than video editing.

IP55 rugged body

2TB capacity

Both cables in box

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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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Spec Comparison

Spec

SanDisk Extreme Portable 2TB

SSK PM510 USB4 Portable 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

3 Years

Score

8.6/10

Total Wins

2 wins

Frequently Asked Questions

Which is better, SanDisk Extreme Portable 2TB or SSK PM510 USB4 Portable 1TB?

Both drives score 8.6/10 in our expert testing. The best choice depends on your specific needs.

What's the difference between SanDisk Extreme Portable 2TB and SSK PM510 USB4 Portable 1TB?

The key differences: The SanDisk Extreme Portable 2TB offers 1,050 MB/s reads vs 3,200 MB/s for the SSK PM510 USB4 Portable 1TB. Capacity options differ: SanDisk Extreme Portable 2TB is 2TB while SSK PM510 USB4 Portable 1TB is 1TB. The SanDisk Extreme Portable 2TB uses USB 3.2 Gen 2 while the SSK PM510 USB4 Portable 1TB uses USB4.

Which is faster, SanDisk Extreme Portable 2TB or SSK PM510 USB4 Portable 1TB?

The SSK PM510 USB4 Portable 1TB is faster with 3,200 MB/s read speeds compared to 1,050 MB/s for the SanDisk Extreme Portable 2TB. That's a 205% speed advantage.

Which has better value, SanDisk Extreme Portable 2TB or SSK PM510 USB4 Portable 1TB?

Both drives score the same in our evaluation. Consider features, endurance, and warranty to determine which suits your needs better.

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