Copy the downloaded 100% save file and paste it into this folder.
This is the most critical section of this guide. Nintendo encrypts all save data, making it unreadable to a standard computer. 3ds 100 save files new
Open the SD card root and navigate to: /3ds/Checkpoint/saves/[Your Game Title]/[Your Backup Name]/ . Copy the downloaded 100% save file and paste
To use 100% save files, your 3DS must be modded with Custom Firmware (CFW) like Luma3DS. 3ds 100 save files new