Bests & Worsts Reviews from Amazon

Summary - performs very well compared to Sandisk, which tend to consider the gold standard for microsd card performance and stability. I tested with 64bit CrystalDiskMark and it's very close in performance. The Samsung writes a little faster but reads a bit slower. As a rough metric I combine the read/write speeds, since you usally need to do both to transfer data - the Samsung is 40 while the Sandisk is 44 about 10% faster overall. If you're using this for a video camera, then the write speed is more important and the Samsung outperforms the Sandisk. As far as long term stability of the card, I've had a lot of off-brand cards and even after several years I've yet to have a failure, so I'd imagine the Samsung is every bit as good as the "no-name" cards. >>>Samsung EVO Class 10 Sequential Read : 23.568 MB/s Sequential Write : 16.343 MB/s Random Read 512KB : 23.056 MB/s Random Write 512KB : 21.477 MB/s Random Read 4KB (QD=1) : 6.702 MB/s [ 1636.2 IOPS] Random Write 4KB (QD=1) : 1.609 MB/s [ 392.8 IOPS] Random Read 4KB (QD=32) : 7.376 MB/s [ 1800.8 IOPS] Random Write 4KB (QD=32) : 1.389 MB/s [ 339.2 IOPS] >>>Sandisk Ultra Class 10 Sequential Read : 31.053 MB/s Sequential Write : 13.109 MB/s Random Read 512KB : 27.086 MB/s Random Write 512KB : 0.574 MB/s Random Read 4KB (QD=1) : 3.217 MB/s [ 785.5 IOPS] Random Write 4KB (QD=1) : 1.390 MB/s [ 339.3 IOPS] Random Read 4KB (QD=32) : 3.073 MB/s [ 750.1 IOPS] Random Write 4KB (QD=32) : 1.419 MB/s [ 346.5 IOPS]