What are you transferring between? (e.g., Windows to Android) What is the exact error text or behavior you see? Do you have access to the game's source code or rpy files ?

If the Ren’Py game is on Steam, the "different device" warning is rarer because Steam handles the synchronization of the persistent data for you. Ensure is enabled in the game properties on both devices. 3. Syncing via Cloud (Dropbox/Google Drive)

Ren'Py saves are not just data; they are "snapshots" of the game's Python state. Because this state can be manipulated, the engine now checks if the "token" (a unique ID for your device) matches the one in the save file. If it doesn't match, it triggers these security warnings to ensure you aren't loading a file from an untrusted source.

If you transferred a save file and cannot load it, use these methods to force Ren’Py to accept the file. Method 1: The Persistent Data Wipe

: Ren'Py now tracks a unique "token" for each device. If you move a save file manually from one computer or phone to another, Ren'Py detects that the device token doesn't match the one in the save file. Verification Prompts

The message "This save was created on a different device" a security notification introduced in Ren'Py 8.1 as part of a new Save Token Security

When you move a save file from your PC to an Android phone, or download a 100% completion save from an online forum, Ren'Py cross-references the file's encryption keys against your local machine token. If they do not match, the system triggers two warnings:

Even after linking your files, loading a cross-device save might cause issues. Here is how to fix them: The Game Crashes Instantly

: Saves created in an earlier version of a game may not be compatible with newer versions. Always update your game to the latest version before attempting to transfer saves.

Try deleting the save folder in your game's directory. This will reset the save files and allow you to start fresh. Note that this will delete all your existing save files, so make sure to back them up if you want to keep them.