Abnormally low read/write performance with Samsung MicroSD card

So I bought this SD card: http://ift.tt/1wwxHr1

Running A1 SD Bench I got speeds of 12MB/s and 3.8MB/s when it should be close to 70MB read and 20MB/s writes.



Any reason why it could be running that slow other than a faulty drive? Is there something I can do do improve this? :(

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