Hello so I don't know much at all about this kind of stuff but I bought a 208 in 1 cartridge for my 3ds and the ds games work but when I wanted to add my own ds games, the files are corrupted. How do I fix this?

The SD cards in those cheap multicarts are fake. I highly recommend replacing it if you can with a genuine one.Hello so I don't know much at all about this kind of stuff but I bought a 208 in 1 cartridge for my 3ds and the ds games work but when I wanted to add my own ds games, the files are corrupted. How do I fix this?