With this modification, you will be able to move items between saved game worlds, you just need to create a new backpack and put all the necessary things in it. Now you can quickly transfer huge reserves of resources from the world that you are no longer interested in. By the way, it is highly recommended to make backups of all your worlds before using this.
How to install Multiverse Pouch
- Download and install Forge
- Download mod
- Unzip it and copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods