The string helps you identify the correct folder. Steam saves use a different format, but tools like RF3SE Save Converter reference the Title ID.
010081C0191D8000 is the unique identifier used by the Switch OS to locate the game's data.
The string 010081C0191D8000 is the unique for the Nintendo Switch version of Rune Factory 3 Special
Fully voiced picture stories narrated by the bachelorettes, providing further depth to the game's romance options. Game Mechanics & Social Life