The difference is that if you simply copy it, it won't be indexed. MP3 files are the one file format that can be copied directly to the CF card and played on the BP without having to be run through the transfer program if the user opts to do so. Since I _was_ using the transfer program, I'd like to know what the error meant. I didn't ask in order to have my motives or actions questioned. ----- Original Message ----- From: "lana" <lana5@xxxxxxxxxxx> To: <bookport@xxxxxxxxxxxxx> Sent: Saturday, March 03, 2007 2:55 PM Subject: [bookport] Re: I'm confused don't understand the difference