Backup Chest for Minecraft PE is an application that can help you to save the contents of your Minecraft world on an external storage. This way, if one day you want to reinstall the game, you will not have to transfer the data from your device to the new one.

It also allows you to create periodic backups of your world, which can be useful in case you want to restore the data on a new device.

The app has a user-friendly interface, so even if you have never used it before, you will not have any problems with it.