In the Ice Guardian game, each player's backpack is fixed and cannot be upgraded or expanded.
In order to be able to carry more props, we can make other backpacks. By completing tasks and challenges in the game, we can earn additional slots to use.
In the early stage of the game, the main mission will give the player a backpack to help the player transition to the later stage of the game.
To make an advanced backpack, players need to obtain the battle-ready backpack blueprint of the Frozen Seaport instance. Only with advanced backpack blueprints can players make more advanced backpacks to better cope with the challenges of the game.
Hopefully this information will help you better understand how to upgrade the Ice Guardian Backpack in the Ice Guardian game. Wish you more success in the game!