Hi Walt,

Yes my SD card is a proper one - made by Toshiba who invented the format in paertnership with Panasonic.

I can format the card in the keyboard and save files to it, I can format it on the computer or in RealOne and save audio to it, but if I format it in SD Jukebox it formats it, then says it has the wrong format, format the card! (SD Jukebox says this wherever I have formatted it - even when it has MIDI, Technics files and audio already on it!)

I still think its a software problem, but If I can find a brand of SD card (1gig or larger) that is completely reliable when used with SD Jukebox I will go for that!