I tried with Fat32, ExFAT and tried to format from Mac/Windows and from the player itself. Samsung and Sandisk cards, 128, 256 and 400 GB and nothing. Tried on MacBook Pro Retina 15" Late 2013 and iMac 27" 2013 too. I don't know where is the issue but as I said, its annoying try to copy information and pull out the microSD each time or enable Android Mode to enable Wifi drop through any app that allows you...
Any thoughts? Maybe the unit its damaged in some point? But if this is the case, where? Because the functionality its perfect in the rest of the tasks, just this app Android File Transfer doesn't allow me to read the SD properly, that's all