I have a Rio Forge MP3 plater that takes MMC and SD cards. I bought a Scandisk 1.0 GB SD card to use with it. The first time I put the card in the player all was well with the world, birds sung, the sun shone and dogs and cats layed down together. I was able to copy some songs off the PC onto the card in the MP3 player.
When I went to play the songs later the Rio Forge failed to reconize the card. I then put it in a Compaq SR1200NX with a 7 in 1 reader and the green in use light turns on but it is unable to access anything on the card and I can’t format the card either.