Ok, i no the SD card is a security disc or whatever, but when i go to put stuff on it it keeps saying "This is a security disc, turn of the security, or use it on other computer" How do i turn of the security so i can use it on any computer?

What SuperTongue said should do the trick. I have a a couple SD cards (1 Sandisk, 1 Kingston) and you will find the switch on the left side with the words Lock written on the top of the card. If you switch it to the unlock position and you're still having trouble copying over files, you may want to try reformatting the SD card. I don't think it matters what format (FAT, FAT16, FAT32) for the Wii to be able to read it, but would suggest just doing FAT32.