Just get the latest boot.firm from https://github.com/AuroraWright/Luma3DS/releases and put it on the SD card root.
You can inject it into CTRNAND to allow the console to boot without a SD card though there is not much reason you would normally want to do that, it might be useful in the unlikely scenario your SD card corrupts or fails while you're away from home and have no chance to fix it, but you have a bunch of retail games with you that you would like to play. Luma3DS Updater has an option to inject to CTRNAND built in.

 

Should just need boot.3dsx from https://github.com/fincs/new-hbmenu/releases/ on the root of the SD and then to follow https://3ds.hacks.guide/finalizing-setup again to get the essential homebrew back. As well as the boot.firm from Luma3DS of course.

 

nvm but now that i can do the thing, it keeps saying my sdcard is write-protected and wont do some of the things i need it to do to finish this

— Posts automatically merged - Please don't double post! —

also disregard, wow im stupid.

 

yep. i got it now tho and got games on it and alls

 

I'm having this issue, it started when I backed up a save game with Checkpoint and modified it a bit with PKHeX. I didn't even get a chance to actually apply the modified save because it started being like this when I first put the SD card back in after modifying the save file on my PC.

I tried deleting the modified save from the \3ds\Checkpoint\saves\0x01B50 Pokémon Ultra Sun folder, still didn't work. Tried updating boot.firm, didn't work, reformatted the entire SD card with Partition Wizard and added back only the essentials, still nothing, reformatted the entire SD card again and left it blank, still nothing. It's like my 2DS is suddenly allergic to this SD card, it's really odd.

Does anybody have any suggestions for what I should try next?

 

It found no issues. :C

 

Yup!