Benchmark Testing of microSD Cards for Embedded System Applications
Which microSD cards perform the best? My test had surprising results. The bottom line is that you need to test. For my application I give a link to the best card below, but you need to test for your application.
Here is a link to the card that was best for may simple data logging application running on the NXP (formerly freescale) FRDM-K64F. I'm going to be using this in my raspberry pi as well.
http://amzn.to/2dWkA3P