Got this last week. It's a drum pad that you can load your own wav files on a AD card and play it like a drum pad. Has an internal memory and a SD card insert. So, I found some wav drum files on the internet, downloaded to the SD card. Machine reads the card and will show the name of the file I choose. Then, it shows file error, formatting error. Specs say use FAT32, ensure your sounds are mono .Wav audio files, sampled at a rate of 48k, 44.1k, 32k, 22.05k and 11.205k and located in the root of the SD cards directory and not in any folders. I've done that. When I go to format the SD card, what am I to use? 512? 32K? I use a musical editor and it is sampled at 44.1K.