I'm having issues using a SanDisk Ultra32GB micro sdhc card. It only shows up if I insert the card before turning the device on and after doing a full reformat it does not seem to work at all.
The only thing I can suggest is maybe trying a different memory card to see if the same results happen. I had a friend that had memory card challenges with a name brand Samsung memory card and upon trying another he had no problems. At least if you try another and encounter the same issue(s) then you know it is the tablet itself.
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