There is not much to say about micro SD cards and readers these days. The card works, the size is as advertised and the read and write speeds were good considering it's USB 2.0. Why will it be USB 2.0 in 2020? Well, there are still some devices that have trouble reading USB 3+ drives in 2.0 ports, despite advertised USB 3 backwards compatibility. One such device is the PlayStation TV, so I decided to use it with it - I use a card for the included USB adapter connected to the USB port of the PS TV. I can report that it works well. The card and adapters work perfectly, I've tested them on several computers (USB 3 and 2 ports) and haven't had any problems with any of them. If you're first transferring data to a computer, you'll probably want to use a USB 3 reader instead of a massive speed boost, but otherwise it's fine.
Memory card Samsung microSDXC 256 GB Class 10, V30, A2, UHS-I U3, R 130 MB/s, adapter to SD
50 Review
Kingston microSDXC 64GB Class 10, V10, A1, UHS-I U1, R 100MB/s Memory Card, SD Adapter, 1 pc, Black
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Smartphone ZTE Blade V10 Vita 2/32 GB, Dual nano SIM, graphite black
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32GB High-Speed Micro SDHC Card - Class 10 UHS-I Compatible Memory Card for SD Devices
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