Just got a Retro Replay and MMC64 bundle. My issue is with the MMC64, in getting it to recognise files...
Basically, I have a SanDisk 2Gig card, formatted using the "FAT" option through Windows. Files copy to the card and show ok. One name, for example, is "12345678.SID". Eject the card, place it in the MMC64 and turn on the C64. Go to the filebrowser, and no files are shown. I have also created a directory called "SYSTEM64" which also does not show in the filebrowser? I have tried other files, with different names and still get the same result. Any ideas? I am REALLY keen to get this all happening, so I can get some classic SID's pumping through my stereo!!!