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Archive for April 14th, 2019

Anker MicroSD Card Adapter Speeds

According to its description, the Anker USB 3.0 card reader can handle both a MicroSD and a standard SD card at once:

Simultaneously read and write on two cards to save yourself the effort of constant unplugging and re-plugging.

Which looks like this:

Anker USB Reader - dual card
Anker USB Reader – dual card

After you get used to inserting the SD card downside-up, it fits perfectly. The Kapton tape on the MicroSD card eases extraction from the still finger-dent-less M20 camera mount on the back of my Tour Easy ‘bent.

Plugged into a USB 3.0 port, my file extractor script chugs along at 25.9 MB/s, taking about 18 minutes to transfer 28 GB of video data.

Splurging another eleven bucks for a second reader produces this setup:

Anker USB Reader - single card
Anker USB Reader – single card

After plugging both readers into adjacent USB 3.0 ports, the script transfers files at 46.6 MB/s and copies 28 GB in 10 minutes.

So, yes, the reader can handle two cards at once, but at half the speed.

Not life-changing, but it shows why I like measurements so much …

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