If u using Joiplay (android) Then go to the Folder location where the Claire's quest is then go into its folder like this ->Claire's Quest -> www (folder) -> save (folder).
You can copy the entire save folder or a specific save file inside the save folder. You can use this method when a new version comes at that time u can replace your old save file in the new version.
Also follow this ->
https://f95zone.to/threads/claires-quest-v0-26-3-dystopian-project.614/post-2621643 to update your save file to the latest version of the game. Basically u have to enter the Gallery through the Pause Menu and then go to the old Guy in the gallery to Update your previous save file to the latest version.
Hope i am clear, if u still confused u can reply me ill gladly help u