I have no probs transfering directly from CDs to SS and then into the NW-HD5 player but S.S seems picky about what MP3s on my pc it wants to transfer. Some work fine, others it refuses to do. Regardless of size etc of the file it will get to a certain percentage and then it virtually freezes my pc up. Only way round this so far is to open the file in an audio editor and then resave, and then it will transfer the "new" file ok - but this is very longwinded way around it!!!! Must be others experiencing this???