So I got my old3ds in the beginning of this year and I've sent it to someone to hardmod it and install the emunand and stuff (it was at 10.something and browserhax didn't work). It uses emuNAND9 and rxtools. It's workig fine, sometimes it freezes before launching rxtools, but it's bearable. After I asked another question here, someone pointed I should be using luma3ds because it's more stable. I then installed Luma, but it won't run. It says my payload couldn't load. I read it could be because emunand9 is outdated. So I have two options: 1.Forget about it and go back to rxtools 2.completely reinstall all the firmware. If you guys think it's better for me to reinstall stuff, I have some questions: 1.Is emuNAND9 still the best option? 2.How do I reset my SD card without losing my save games? 3.Is there a complete noob-proofed guide anywhere in here that is updated? 4.What's arm9loaderhax?