If you want to delete demos off your 3DS, there are a few different ways to go about it. The first way is to use the Nintendo 3DS System Settings. To do this, open the System Settings menu and select “System Settings.” Then select “Deleting Demos.” To delete demos from a specific game, you’ll need to access the game’s Options menu. To do this, open the game’s main menu and select “Options.” From here, you can access the “Demo” option. Select it and choose which demos you want to delete. The final way to delete demos is by using a computer. If you have a USB cable connected to your 3DS, you can use the Nintendo eShop on your computer to download demo files. Once you have downloaded the files, open them with a program like WinRAR or 7-Zip and delete the demos inside. ..
