I had a couple of SD cards that worked fine. Bootmii, various wads, usb loaders and dlc. No problem. Just needed a bigger card to fit everything on. So bought a 4gb card (dane-elec on the compat list) and everything works great. Except DLC. When Guitar Hero reads the card it says it cant use it. All the data was copied straight from the 2gb card I had which works fine. I have tried formatting both FAT and FAT32 but no joy. It took me 4 hours to manually add all the DLC to the 2gb card and would prefer not to do it all again. Anyone any ideas? Thanks.