Keep in mind that though you can reach the sequential read/write limit with a lot of say class 10 cards, but there is sadly no specification for random read/write performance which influences the experience on single board computers / application type setups. Check the stickied thread on how to measure, some very expensive cards have good linear read/write performance but fail horribly at random I/O because what they are usually optimized for is writing linear image and video streams in cameras... from my experience it makes a lot of difference with Android as well. http://forum.pine64.org/showthread.php?tid=191&page=8 , http://forum.armbian.com/index.php/topic...rformance/
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