Save data for the game is primarily stored in the folder, which is hidden by default on Windows.
Some players use "cheat save points" (inputting specific key commands like for coins or feed and grow fish save file
C:\Users\[YourUsername]\AppData\LocalLow\Old B1ood\Feed and Grow _ Fish Alternate Path (Steam Library): Save data for the game is primarily stored
The save data for Feed and Grow: Fish is primarily stored within the game's installation directory on Windows systems. Standard Path feed and grow fish save file