The file you are looking for is usually named (or single_1.sv , etc.). The number corresponds to your character slot in the game menu. Multiplayer characters use .drv files.
C:\Users\[YourUsername]\AppData\Local\Packages\Microsoft.BobbyD-Package\LocalState\Diablo\ diablo 1 save file location
Save files:
Named single_#.sv (where # is a number from 0 to 9). Multiplayer Saves: Named multi_#.sv . Hellfire Saves: Named single_#.hsv or multi_#.hsv . The file you are looking for is usually named (or single_1
Would you like details on converting saves between versions or troubleshooting missing saves on Windows 10/11? diablo 1 save file location