Things You'll Need
Instructions
Insert the Wii SD card into the slot of the SD card reader. Plug the SD card reader's USB cable into a USB port on the computer.
Click "Start," then "My Computer" and "Devices." Select the icon of the Wii SD card in the center column of the window that appears beneath the "Removable Devices &Storage" tab. Right-click on the icon of the Wii SD card. Select "Properties" from the pop-up menu.
Select the "Format" tab at the top of the window that appears. Uncheck the "Quick Format" checkbox on the window. Select "FAT" from the "Format Type" drop down menu on the window.
Click the "Start" button at the bottom of the window. Wait as a progress bar at the bottom of the window fills in from left to right. Click the red "X" in the upper right corner of the window when the progress bar is completely filled in. Click the red "X" in the upper right corner of the window that is still open on the screen.
Go to a free audio conversion website such as mediaconverter.org or media-convert.com. Click on the "Upload File" or "Upload Link" button on the web page. Navigate in the window that appears to a music file that you want to play on the Wii. Double-click on the music file to close the window and return to the web page.
Click the "Next" button on the web page to go to a new web page. Select "MP3" or "Wii/MP3" from the "Format" drop-down menu on the web page. Click the "Next" button to go to a new web page. Click the "Start" or "Go" button on the web page. Wait until the "Next" button is no longer dimmed. Click on the "Next" button to go to a new web page.
Click the "Save" or "Save To" button on the web page. Navigate in the window that appears to the desktop. Double-click on the icon of the Wii SD card. Wait as the music file that was converted is downloaded to the Wii SD card. Click the "Finished" button on the web page when the window disappears.
Right-click on the icon of the Wii SD card that is on the desktop. Select "Eject" from the pop-up menu. Remove the SD card reader's USB cable from the USB port of the PC. Remove the Wii SD card from the USB port of the PC.