If you already have a character with the same name, you must edit the save file using (a third-party tool) or manually rename the folder and edit the internal player.gdc with a hex editor—which is advanced. Simpler: move your old character out of the main folder temporarily.
If both PCs have cloud saving enabled and are logged into the same Steam account, Steam should automatically sync your saves. However, as discussed earlier, cloud sync can be unreliable. A manual USB transfer is always safer. Grim Dawn Save File Download
Can't find save character file location, I wanna get into GDStash. If you already have a character with the