Hacking unstuck on boot.dat? sadface is mine. help, please?

[Baleifous]

Hi guys. I removed my sd card from switch to put on him a new game. When i put the card back in the switch, it gets on a black screen written boot.dat?
My pc can read the micro sd but my switch can't. I read that the card was corrupted and need to format it to fat32.
I can't boot him on CFW OR OFW too.
Anyone can help me, please?
Thanks

 

[Jayro]

place boot.dat onto the SD card, not in any folder.

 

[Baleifous]

place boot.dat onto the SD card, not in any folder.

I'm goint to try it. Thanks.

 

[Baleifous]

I'm goint to try it. Thanks.

sd card was already in the root