Not all SD Cards are compatible with the Wii console. Please read the following:

If you have not yet updated your Wii console to Wii Menu 4.0 (click here to find out how) or higher, then your Wii console is only compatible with SD Cards that are 2 GB (Gigabyte) or less. Cards with a capacity higher than 2 GB will likely not work with the Wii console if it has not been updated to 4.0 or higher.

If you have updated your Wii console to Wii Menu 4.0 or higher, then your Wii console is compatible with SD Cards that are 2 GB (Gigabyte) or less, and is also compatible with SDHC Cards (so-called High Capacity SD Cards) up to 32 GB. SD Cards with a capacity higher than 2 GB, and SDHC Cards with a capacity higher than 32 GB, will likely not work with the Wii console.

SD Cards with a slow speed may experience slow transfer time when loading files, or may not work at all. Slow transfer times can also occur with SD Cards that have a great number of files on them.

Please note that even with a compatible SD Card, some devices may create image or movie files that are not compatible with the Wii Console. Click here for more information.