Just received today for my RetroPie setup. I'm trying to write to it but keep getting invalid spelling errors. My guess is that either the cards are defective or the reader is defective. Speaking of readers, this is a sketchy-looking thing that barely works. One touch and the connection to the computer is disconnected. This is a cheap piece and looks like it was heavily used before it was sent to me due to all the scratches on the surface. Very disappointed and will return if I don't get this working by tomorrow. (Update) Got a job. It was the reader. I give 4 stars because they are good cards for the price. But I keep the star for the Shotgun SD card reader.
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