I am using SS3.1 with my new HD5. For consistency I thought I would convert my existing MP3 files into ATRAC+. Highlighted all the MP3's and did the conversion but SS3 seems to keep a copy of the MP3 as well as creating an ATRAC+. However when I transfer to my HD5 the MP3 is transferred not the ATRAC. The only way I have managed to stop this is to delete the MP3 files from Sonic Stage. Advice please.