You can install USB LOADER to read the hard disk, and of course you can also use the following software, which was found in a search and rescue.
How to copy the game to the hard disk needs to be written with imported software like Una, and then the WII can read it.
Attached below is a tutorial of hard disk direct reading software.
Wii's new reading software course includes downloading hard disk games.
Preparation: an SD card, a mobile hard disk with Wii games, and an SD card reader.
Copy the files in the compressed package to the root directory of the SD card, and then connect the SD card and the mobile hard disk to the Wii host.
Enter the "Homebrew Channel"
Click the icon in the lower right corner to enter HBC.
Select Cover Loader.
Select "Load" to enter the software.
The game selection screen is gorgeous, and the icon of the game disk can be downloaded from the Internet and saved in the' images' directory of the SD card (51.68 software is recommended).
Click the game by pressing the A key and select "Load" to enter the game.