This method will only work on your first day in-game.
You can now start working towards your perfect island by deciding on a great name and layout.
This method will erase all Animal Crossing: New Horizons data on your Nintendo Switch. Do not reset your island unless you’re absolutely sure you want to erase all your data. Recovery is only available in the event your current Switch is lost, stolen, or damaged, you have an active Nintendo Switch Online membership, and have a new Nintendo Switch console. [1] X Research source
This method will erase all Animal Crossing: New Horizons data on your Nintendo Switch. Do not reset your island unless you’re absolutely sure you want to erase all your data. Recovery is only available in the event your current Switch is lost, stolen, or damaged, you have an active Nintendo Switch Online membership, and have a new Nintendo Switch console. [1] X Research source
Your Switch will begin to delete the save data.
If you don’t like the layout or fruit options given to you at random, you can reset your island on day one as many times as you’d like. Don’t forget to practice your fishing skills to finish the museum or pay off your loan. This will help your new island succeed.