Adata SE920 portable SSD review: Cheaper, faster USB 4 storage

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Judging from the huge fins on the 1M2, and the micro-fan inside the SE920 — USB 4 generates almost as much heat as Thunderbolt. At least at the full 40Gbps. As you know, heat is unavoidable with electronics, but getting rid of it is essential to stability and longevity.

Adata provides a five-year warranty for the SE920. It’s a limited warranty, which means it’s mitigated by the amount of data written to the drive as well as physical abuse. The amount of data written can’t exceed a reasonable amount, which is likely 600TBW per 1TB of NAND if Adata follows the industry standard.

How much is the Adata SE920?

According to Adata, the 1TB SE920 will cost $140, the 2TB model will run $200, and the high-capacity 4TB is $380. More than 20Gbps USB SSDs, but not significantly, and miles cheaper than the OWC 1M2 — the only other external USB 4 SSD we’re aware of.

One thing I should point out is that being USB 4, rather than USB 3.2×2, you’ll get excellent performance on a Mac as well. Apple, for some unknown reason supports only 10Gbps with USB 3.2, meaning 3.2×2 20Gbps SSDS are constrained to half their potential. Nice one, Apple.

Not to let the USB Forum off the hook — there’s actually a 20Gbps mode for USB 4 in addition to the one for USB 3.2×2, and apparently the twain shall never meet in Apple land. Sigh.

How fast is the Adata SE920?

It wasn’t a blow out, but the Adata SE920 took the title of “Fastest external drive we’ve tested” from the OWC 1M2. At least at 40Gbps in synthetic benchmarks. At 20Gbps (using USB 3.2×2), under the synthetics, the opposite proved true — by about an equal margin.

As you buy USB 4 for the 40Gbps (or should), we weighted our judgement accordingly. Note that you can see the charts in larger format by right-clicking over them and selecting “View in new tab.”

            <div class="lightbox-image-container foundry-lightbox"><div class="extendedBlock-wrapper block-coreImage undefined"><figure class="wp-block-image size-large enlarged-image"><img decoding="async" data-wp-bind--src="selectors.core.image.enlargedImgSrc" data-wp-style--object-fit="selectors.core.image.lightboxObjectFit" src="" alt="" class="wp-image-2291717" width="1200" height="606" loading="lazy" /><figcaption class="wp-element-caption">The Adata SE920 was the fastest 40Gbps SSD we&rsquo;ve tested, by a decent margin. At 20Gbps, not as much. Longer bars are better.</figcaption></figure></div>

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In the end, however, the performance differences between the two USB 4 drives aren’t really worth worrying about. Subjectively, you’d never notice in a million years. This is demonstrated again below.