When I got my Sony NW-HD1, it came with SonicStage 2.3. I used this to transfer audio files to my player. Although I was transferring MP3 files, the transfer to the player was actuallly in Atrac3 format; the conversion put copies of all my MP3 files in OMA format in my All Users/Sonicstage/Packages directory on my system. So, in essence, I ended up with two copies of each file: one MP3 and one OMA. After backing up the MP3 files to CD, I deleted them from my system, leaving only the OMA copies. Last week I upgraded my player to play MP3 files directly. Although I was told that I would need to backup and restore my music because the upgrade would reformat my HD, this was not the case, and the HD was still intact. However, I checked the Sony site and saw that a newer version of SonicStage was available: 3.1. So, I dowloaded and installed it. Then, to my surprise, it would not recognize my player, and told me I had to initialize it to use this new version. Since I thought I had all my files backed up in OMA format (I had deleted the original MP3 files), I initialized the HD. Then proceded to transfer back all my music. And it all seemed to work ok, except there were some missing files for some reason. No problem, I had the original MP3 files backed up on CDs. Copied the missing files over to a empty folder on my desktop, then imported them into SonicStage. Then transferred them over to the HD1. This is where my problems and confusion begins::: The MP3 files were transferred directly to the HD1.. no conversion to Atrac3 and none copied as OMA files into the directory with the others. I had wanted to keep all the same format (OMA), but could not find anywhere in the new SonicStage 3.1 software to convert to Atrac3 before transferring. I had wanted to delete the temp folder of MP3 files, but since they were not converted, I am hesitant. Is there no way of converting to Atrac3 once the mp3 firmware upgrade is installed and SS v3.1 is used? Secondly, when using SonicStage, I cannot seem to sort the listing of files on my HD1. The files seem to be listed in the same order they were transferred. This makes it difficult to compare what's on my HD1 with what is on my computer. I can sort my library by clicking on the column headings, but cannot do this for the list of files on my HD1. Any suggestions?