SK hynix Beetle X31 (2TB) review: a solid, snazzy scarab

SK hynix's Beetle X31 gets roomier, with a 2TB capacity. Its performance isn't the best in its class, but is still solid. Its pebble-like shape, solid metal shell, and excellent accessories help it stand out.

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The SK hynix Beetle X31 first crawled onto the external SSD stage in mid-2023, sporting a gold-clad aluminum chassis, a 10 Gbps interface, and a top capacity of 1TB. Now the company is updating its lineup with the 2TB Beetle X31 we're looking at here. The more spacious scarab drive sports a silver carapace this time, but aside from the color shift and a doubling of capacity, not much has changed – which certainly isn't a bad thing.

Specifications

Design and Accessories for the SK hynix Beetle X31

At 2.91 x 1.81 x 0.58 inches with a smooth silver metal shell, the X31 feels more like a futuristic pebble than a six-legged insect. It arguably feels better in the hand than any portable drive I've tested – for whatever that's worth. It's also pretty pocket friendly, though competing drives from Crucial and Silicon power are slimmer.

The drive also has silicon bumpers on the bottom that both hide the internal access screws and keep the SSD from slipping around on your desk. Overall, I like the design a lot, though Crucial's X9 and X10 drive feel similarly solid and are thinner.
The drive ships free of any kind of software or apps, which I think is generally fine since most included storage software is usually freeware or offers little tangible value anyway.

Comparison Products

There are loads of 2TB 10 Gbps external storage options on the market, including some of the best flash drives and the best external SSDs. But the toughest competition for the Beetle X31 will come from a couple of lower-priced 10 Gbps options, namely Crucial's X9 Pro and the Silicon Power PX10. The latter was selling for just $124 in the 2TB capacity when we wrote this review.

Both of those drives are also slimmer than the Beetle X31, though the PX10 is longer (housing a full-size 2280 SSD under its aluminum shell, and Crucial's drive is a little wider. Really though, it's all going to come down to performance.

Trace Testing - PCMark 10 Storage Benchmark

PCMark 10 is a trace-based benchmark that uses a wide-ranging set of real-world traces from popular applications and everyday tasks to measure the performance of storage devices.

The Beetle X31 didn't start off our testing on a high note, with its 1001 score here landing it in the lower half of our comparison drives. But it does manage to beat Samsung's 10 GBps T7 Shield. The Silicon Power PX10 does better here, and costs less.

Transfer Rates – DiskBench

We use the DiskBench storage benchmarking tool to test real-world file transfer performance with a custom 50 GB dataset. We copy 4,617 files (images, videos, and software ISO files) to a folder on the test drive (write). Then, after leaving the system idle for five minutes, we run the same test in reverse, moving the test folder to a different location on our PCIe 4.0 testing drive.

Once again the Beetle X31 fails to land near the top, this time beating only the two Samsung drives. That said, its read speeds aren't that far off the competition, when you disregard the pricier 20 GBps Crucial X10 Pro that's primarily here for context. And its write performance was better in this test, landing in third place among other 10 Gbps drives.

Synthetic Testing CrystalDiskMark

CrystalDiskMark (CDM) is a free and easy-to-run storage benchmarking tool that SSD companies commonly use to assign product performance specifications. It gives us insight into how each device handles different file sizes. We run this test at its default settings.

In this synthetic sequential test, the hynix drive looks its best yet, with similar reads and writes landing it just behind the PX10 in the former and just ahead in the latter.

Looking at IOPS, the Beetle X31 is a mixed bag, besting everything but the PX10 on reads, but only beating the poor-performing T5 Evo on random writes. Still, its write score is at least respectable here. I wouldn't recommend booting your primary OS from the SK hynix drive (or any external SSD, honestly), but for typical storage and light program tasks, these results are more than fine.

Sustained Write Performance

A drive's rated write specifications are only a piece of the performance picture. Most external SSDs (just like their internal counterparts) implement a write cache, or a fast area of flash, programmed to perform like faster SLC, that absorbs incoming data.

Sustained write speeds often suffer tremendously when the workload saturates the cache and slips into the "native" TLC or QLC flash. We use Iometer to hammer the SSD with sequential writes for 15 minutes to measure the size of the write cache and performance after the cache is saturated.

On this last and most demanding test, the SK hynix Beetle X31 performed reasonably well, managing to write at around 1040 MB/s for about seven minutes, but then it fell to a very slow sub-150 MB/s range for the rest of our test. That means if you're writing less than about 430 GB, the SK hynix drive will be faster than most 10 GBps drives. But if you're writing substantially more than that in one continuous run, many drives will be faster.

The T7 Shield and Seagate Game drive managed to stick close to 100 MB/s throughout our test. And the Silicon Power PX 10, while it dropped down from its peak performance after a minute on this test, still managed to stay above 800 MB/s for nearly the entirety of our test, making it much faster than the hynix drive for truly demanding pro-level tasks, like filling the entire drive quickly.

Bottom Line

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