Lexar Professional Workflow SDHCSDXC UHS-II USB 3.0 Reader (SR2) Review + Speed Test

Hey guys, I’m going to check out the Lexar Professional Workflow SDHC/SDXC UHS-II USB 3.0 SR2 Reader, which I’ve been using to copy all video files from my camera onto my desktop for a while now, so let’s get into it!

The reader is pretty simple and straight forward, you plug it into your computer with the included USB 3.0 cable and it just works, there’s no need to install anything. One end of the cable is the standard type A connector we’re all familiar with, which plugs into a USB 3.0 port on the computer, while the other is a Type-B SuperSpeed connection which plugs into the reader itself.

Lexar Professional Workflow SDHCSDXC UHS-II
Lexar Professional Workflow SDHCSDXC UHS-II

Other than that, the only other slot on the reader is the one on the front for inserting your SD card into. There’s also a rubber cover included that can be placed on the front of the reader when it’s not in use to protect the card slot from dust. Before I purchased this SD card reader I was using a random USB 2.0 dock and only got a 4MB/s read and write speed, so copying files off of this took way too long to be practical as a video shoot is typically many gigabytes.

I was also previously using a cheap 16gb SD card, however I upgraded this to a Lexar Professional 1000x 128GB SDXC UHS-II/U3 card which is rated up to 150MB/s read speed. So although the card could now support much higher speeds, my crappy old dock was still the limiting factor. Here you can see a speed test that I performed with the new 128GB SD card previously mentioned, it’s only getting about 4MB/s read speed and 4MB/s write speed, pretty terrible.

I didn’t even finish the test because it took over an hour just to finish the sequential read and write tests. Despite not being fully complete it still shows that the speeds were really bad. This is where the Lexar USB 3.0 reader came in to significantly improve speeds. It’s important to note that the older USB 2.0 standard can only provide a maximum speed of 480 Mbit/s which translates to 60MB/s of read or write speed.

Lexar Professional Workflow SDHCSDXC UHS-II
Lexar Professional Workflow SDHCSDXC UHS-II

This isn’t even half of what my SD card is rated at, so a USB 3.0 card reader is definitely required here to ensure that the USB transfer speed is not the bottleneck in my file transfers. USB 3.0 has a 5 Gbit/s limit which translates to 625MB/s read or write speeds, essentially 10 times faster than USB 2.0 Now here are the results of the 128GB card in the Lexar Professional Workflow SDHC/SDXC UHS-II USB 3.0 Reader (SR2).

We can see that we’re getting the full 150MB/s read speed of the card, the reader is no longer a bottleneck and the faster USB 3.0 speeds are also coming in use here. I’m not going to get much faster speeds here, I’m using a UHS-II/U3 SDXC card with a UHS-II SDXC reader. SDXC version 4.0 allows speeds of up to 156MB/s, so basically this confirms that the combination of Lexar SD card and reader are almost giving me perfect speeds.

The U3 part of the card means that the card supports a 30MB/s write speed at a minimum, which we have also confirmed that we are hitting here so this card should support 4K video recording, and granted my camera doesn’t currently support this it’s nice to know I can use the card for it in the future if I need to. So with a combination of good reader and SD card I can now copy large video and image files off of my SD card from my camera a lot faster, which will reduce the amount of time I spend waiting going forward.

Lexar Professional Workflow
Lexar Professional Workflow

Making use of both the Lexar Professional 1000x 128GB SDXC UHS-II/U3 Card and the Lexar Professional Workflow SDHC/SDXC UHS-II USB 3.0 Reader (SR2) has significantly sped up my video editing workflow and I highly recommend upgrading to a decent SD card and reader combination for this reason if you haven’t already. I’d be interested in hearing what sort of speeds you guys get copying media from your SD cards to your computer, as well as the readers and cards that you’re using, be sure to let me know down in the comments.


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