i have a big problem :
i have formatted per error, the internal memory of my DX90, on mac os.
i wanted to format the micro sd external card.
since, when i connect the DX90 to my mac, the internal memory is not visible, it can not be seen.
what shall i do now ?
reset factory, but nothing !!!
I had the same issue. Contracting iBasso support they provided me with software and instructions to reflash the firmware which reformats the internal storage to the correct format.