What is the Save Backup Feature? [APP GENERATOR / APK]

Some APKs (Android applications) have a save data backup feature.
Works that contain such a feature will have a "This work allows for save data backup" note in their product descriptions.

This feature allows you to backup save data for a work to the cloud.
This feature can be used to transfer save data to other devices.
If the work is updated, it is also possible to use those uploaded save data with the updated version.

■ Save Data Upload

After starting the application, save data can be uploaded to the cloud via [ 設定 ] > [ アップロード ]. Confirm to upload the app's save data on your device to the cloud as a backup.

はい button： Upload save data to the cloud.
いいえ button： Cancel.

■ Downloading Save Data

After starting the application, save data can be downloaded from the cloud via [ 設定 ] > [ ダウンロード ]. Confirm to download the save data from the cloud to your device.

はい button： Download save data to the cloud.
いいえ button： Cancel.

* Once the save data has finished downloading, please restart the game using [ Restart ] which is found under the same “Settings” menu as [ Download ].

■ How to Use Existing Save Data with Updated Works

1. Upload your save data to the cloud.
   After starting the game, upload save data to the cloud via [ 設定 ] > [ アップロード ] > [ はい ].
   When the upload is complete, you will receive a message reading [ アップロードに成功しました ].
   * If the upload fails, please check your internet connection before trying again.
   * Save data cannot be recovered if the game is uninstalled first.
    
2. Uninstall the game data from the device.
   
    
3. Install the updated version of the game.
   Login to the account you used to purchase the work, go to My Page > [ Purchased Items ], select the work, and redownload the game data.
   After downloading the game, install the game.
    
4. Transfer the cloud save data back onto your device.
   After starting the game, download the cloud save data via [ 設定 ] > [ ダウンロード ] > [ はい ].
   If you see a message reading [ ダウンロードに成功しました ], the save data has been successfully transferred.

[ Warning ]

• All save data for relevant works on your device will be saved. 
  Save files, etc. cannot be individually saved.
• If the data fails to download or upload, please check your internet connection before trying again.
• Save data backed up on the cloud will remain for half a year following last upload. 
  * Save data on devices remains indefinitely.