Hacking Animal Crossing Save Data transfer

[KacyRaider]

Hello! I am incredibly new to switch modding and I had a question about transferring my ACNH island from a CFW switch to my OLED switch.

After losing my island 3 times, I've decided to just mod my file just to restore my island to what it was previously using a save editor)
How do I transfer my island to my OLED switch after modifying it on the CFW Switch without triggering a ban?

 

[oli200110]

Hey! I also had a similar question on another thread, and the helpful user Binkinator found me a relevant Reddit post I'll also try today: