Dumping your Discs allows you to install a copy of your game to the system NAND/a USB device so you can play it without needing the disc.
?> Dumping and installing games requires a working Homebrew setup, so make sure to finish the main guide on installing CFW first before following this.
?> Installing a game to the system memory (NAND) is not recommended as it's limited to either 8GB or 32GB depending on your model, making you run out of space pretty quickly if you want to install multiple games.
?> When installing a game to a USB device, we recommend that you use an HDD and not a flash drive, as those are not optimized for constant reading and writing, therefore making them fail quickly. If your HDD is not externally powered, you will need a Y-cable to connect it to two USB slots on the Wii U.
!> In order to install to a USB device, it has to be formatted by the Wii U. Doing this will erase all contents of it, and prevent it from being used on another system unless you reformat it. To do this, plug your USB HDD into the Wii U, power on your Wii U, your Wii U will prompt you to format your HDD. Confirm with Yes.
?> If you don't want to keep the game installed on NAND, you can use the Wii U's data management to move the game to a USB device.
!> In order to move your game to a USB device, it has to be formatted by the Wii U. Doing this will erase all contents of it, and prevent it from being used on another system unless you reformat it.
1. Plug your USB device into the Wii U.
1. Power on your Wii U.
1. Your Wii U will prompt you to format your USB device. Confirm with Yes.
1. Open the Wii U's System Settings.
1. Navigate to `Data Management > Copy/Move/Delete Data > System Memory > Move Items (X)`
1. Select the game and move all data (including updates and DLC if any are installed) to your USB device.
?> If your disc game had DLC or updates installed, you will need to transfer the files over to your USB device. You can do this using the Wii U's data management.
1. Power on your Wii U
1. Open the Wii U's System Settings.
1. Navigate to `Data Management > Copy/Move/Delete Data > System Memory > Move Items (X)`.