To transfer data from a Nintendo Switch (Switch 1) to a Nintendo Switch 2, follow these steps:

1. Ensure both consoles are powered on, connected to AC adapters, and near each other.
2. When setting up the Switch 2 for the first time, it will prompt you to transfer data from your original Switch. If you skipped this step, you can start the transfer in the Settings menu on Switch 1 by going to System Settings > System > System Transfer to Nintendo Switch 2.
3. You will select which user and save data to transfer. The system will warn that some data on Switch 1 will be deleted after transfer.
4. Confirm and start the transfer. The consoles will communicate and transfer your games, save files, user profiles, screenshots, and other data.
5. The process can take several minutes depending on the amount of data.
6. After the transfer completes, Switch 2 will restart and begin redownloading your games.

This method transfers your user accounts, save data, installed games, screenshots, videos, system settings, and friends list from Switch 1 to Switch 2, making the new console ready with your previous data.

If further detail or specific step-by-step guidance is required, that can be provided.