The safest way to edit a game save is with a tool designed specifically for that game. Open .sav files without spss | AddMaple
SPSS integrates a Python spss module that allows direct cell-level editing of the active dataset without using the SAVE command. How To Edit Active Sav File
Sites like Save Editor Online allow you to upload the file, modify specific values through a user-friendly interface, and download the new version. The safest way to edit a game save
Because these files are not human-readable, you must use one of the following methods to modify them: How To Edit Active Sav File