Diablo III: Eternal Collection on Nintendo Switch, fixing or using save editors requires custom firmware (CFW) as Nintendo does not allow save extraction to an SD card by default. Recommended Tools & Methods D3StudioFork
: This tool is essential for Switch users to export and import their save data from the console to a PC for editing. D3Edit (Python Script) diablo 3 nintendo switch save editor fix
Only do this if you are confident that your cloud save is older than the corruption. If the cloud synced the corrupt data, this method will not work. Diablo III: Eternal Collection on Nintendo Switch, fixing