Bought in 2017, this week I finally tried it for a raspberry pi project. After I wrote to them once, the cards stopped working. Troubleshooting: I tried reading them on a Raspberry Pi, then tried on a Linux laptop as well as an OSX desktop. Neither computer recognized it as a valid format, couldn't reformat, and when I finally downloaded the official SD card formatter app, it treated two micro SD cards as "32MB" and gave when trying to format them , an error page. The packaging looked legitimate, as did the micro SD cards and their SD card adapters. Either they were really good fakes, or both SD cards were equally bad.
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