What are the steps for converting my wav files because I loaded the wav to my floppy disk using an external floppy drive. And when I put it into my mpc2000 it just says

??
I don't know why it does that. I put 4 individual wav files and the computer says tha their on the file, However the Mpc2000 can't read them.
My focus is trying to make the mpc2000 read my floppy disk? Someone said it could load both wav and snd. But mine didn't read my wav files so I thought converting them to SND was the best choice. Understand where i'm coming from, So thats why I ask how can I CONVERT MY WAV. FILES. INTO SND. FILES? Thank you all for your help!