Hades - Save Data for Nintendo Switch - No Game Included

You have to upload your save file via Nintendo Online service.

The latest update for Hades adds cross-save support for Switch and PC

Hades uses Epic Online Services to incorporate cross-platform cloud saves and achievements - Epic Online Services

Hades for Nintendo Switch - Nintendo Official Site

Hades cross-save function isn't coming with v1.0, planned for later update

Wifi failed on my switch, went to get it repaired They gave me a new switch, but I lost 200 hours of save data : r/Switch

What are the charging and data transfer capabilities of the new Nintendo Switch? - Quora

Best Nintendo Switch Settings You Should Be Using

Nintendo Switch VS. Lite: How To Choose

Cross-Saves Are Now Available For Hades

Hades' cross-save: How to set it up on Nintendo Switch and PC

Nintendo Switch Tips (2023): 21 Surprising Things It Can Do (OLED, Lite, Standard)