Music copying problem with my fuze

I have a problem copying music to my sansa. I arranged the music in folders, and copied it to the sansa. However, the second half of my folders didn’t copy for some strange reason. I’ve tried it a couple of times, the files are correct format, i’m not sure what to do.

Instead of copying the files to your fuze already in folders just copy the files themselves to the music folder on the fuze. The folders dont really do much right now because the duze does not support navigation by Folder.