You could relink a NNID if you first unlink it before the format. Again, system reformat erases your entire games collection. You could redownload everything from eShop if you legitimately purchased those. However, this won't restore the saves.
If you think you can outsmart the reformat by backing up a copy of the Nintendo 3DS folder, think again. You can't reuse that folder after the format because of changed encryption between the 3DS firmware and SD contents.
Format System Memory is terrible advice when it comes to repairing the 3DS firmware.
I don't think it is that terrible. Save backup could be done by Checkpoint. I think OT could install Checkpoint to backup before do formating. Eshop apps could be redownload. Is there anything could be lose?You could relink a NNID if you first unlink it before the format. Again, system reformat erases your entire games collection. You could redownload everything from eShop if you legitimately purchased those. However, this won't restore the saves.
If you think you can outsmart the reformat by backing up a copy of the Nintendo 3DS folder, think again. You can't reuse that folder after the format because of changed encryption between the 3DS firmware and SD contents.
Format System Memory is terrible advice when it comes to repairing the 3DS firmware.