Then he noticed the date on his phone.

If you are looking for information related to managing or transferring Nintendo 3DS save data, here are the official and community-standard methods: Official Management & Transfer Save Data Transfer Tool

: The primary homebrew utility for backing up and restoring save files from both physical cartridges and digital titles.

With three massive story routes (Birthright, Conquest, Revelation), a 100% save file is a treasure. It typically includes:

Delete the files inside and replace them with the 100% save files you downloaded. Restore the Save Put the SD card back in your 3DS and open Checkpoint. Select the game and the backup folder you just modified. to restore the save to your game. Essential Tools Checkpoint