Hi, Any help would be appreciated my R4 is not showing any files, when plugged into computer it says no files located but when I open it up a bit further it says that the SD card is full to capacity so I would assume that the files and folders that I put on are still there but can't be seen. I have a 2gb sd card and if I reformat it I will lose the 40 or so games that I have put on Worked fine up until a week ago. Help please.
Use windows, turn on hidden files and see if you can see anything, if not then the card has been corrupted and there is nothing more you can do. They usually corrupt of they are turned off when doing something (saving a game or loading a game)
You may be able to format the card to start again, if the PC fails I have used a camera before and that managed to get the card to format, then it was fine.