David B. Horvath
I had problems using the chip in the reader built into my laptop. It seemed to only want to format up to 32Gb. When I plugged it into my phone, I could format at 64 Gb but then the laptop reader saw it as empty. When I used a USB reader, then the laptop could read it just fine.I was able to copy the 4Gb of data from my old microSD to this chip and have not had any problems with it yet.