Errfix3dsx

Ensures that the link between the physical ROM and the writable save chip is intact.

If none of the above steps work and you’re experiencing a "prefetch abort (svcBreak)" error, it could indicate a more serious issue with your system NAND. In this case, you may need to perform a CTRTransfer. This process essentially reinstalls a clean copy of your 3DS’s system software. errfix3dsx

An outdated custom firmware version trying to run a new system update is a massive source of errors. Ensures that the link between the physical ROM