So, I’ve copied over my ~1400 files spread through 81 folders and the Fuze only seems to be find 10 MP3s.
2 of them were files that came with it and the other 6 were ones I added.
I’ve had previous Sansa players and never had this issue.
I copied my files over to the music folder with windows explorer. I don’t use iTunes nor the lame Rapsody programs.