I recently bought a 2 gb SD Card and I wanted to put some music and video files on it so I could watch them on my Nintendo Wii but I don't know how. I also have a Lexmark 5400 Series All-In-One Printer that accepts SD Cards. So if anyone knows how to do this could you please help me?

You need a card reader. When you insert the card in the reader its acts as a drive letter and you can copy files to the card like any drive.

Thank you for your answer, I thought that the printer would allow me to put files on the card.

Some printers do allow you to use the card reader on the printer to transfer files. You would need to check the printer documentation to see if it supports it.

Ok, thank you very much for your help , I appreciate your answer.