HDMCSDX512GCL10UIJP3（FAT32フォーマットして計測した状態）
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CrystalDiskMark 6.0.2 x64 (C) 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/
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* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 70.803 MB/s
Sequential Write (Q= 32,T= 1) : 48.179 MB/s
Random Read 4KiB (Q= 8,T= 8) : 15.925 MB/s [ 3887.9 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 3.869 MB/s [ 944.6 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 13.142 MB/s [ 3208.5 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 4.520 MB/s [ 1103.5 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 7.516 MB/s [ 1835.0 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 3.155 MB/s [ 770.3 IOPS]

Test : 1024 MiB [E: 0.0% (0.0/462.7 GiB)] (x5) [Interval=5 sec]
Date : 2019/01/04 1:19:39
OS : Windows 10 Professional [10.0 Build 17763] (x64)

自分の用途としては母艦PCのデータをMicroSDで同期取って
AndroidやONEMIXで外で見るためなのでスペックは全然きにしなかった