Put shulker boxes inside a Netherite backpack. That’s effectively hundreds of extra stacks.
Unlike a mere chest or shulker box in your hand, Sophisticangel backpacks are equipped in the chestplate slot. You can access them via a hotkey or touchscreen button. When not accessed, the backpack simply hangs on your back — no loss of armor defense (depending on config). File Name- Sophisticangel-Backpack-Addon-MCPE-1...
Why should you download this? It fundamentally changes the "flow state" of Minecraft PE. On mobile devices, managing inventory can be tedious due to touch controls. Having a portable, high-capacity storage solution reduces the number of trips back to your base, allowing you to stay in the mines, the Nether, or the End for longer periods. Put shulker boxes inside a Netherite backpack
It encourages exploration. When you aren't worried about running out of space after mining ten stacks of iron, you are free to explore further biomes and discover rarer structures. You can access them via a hotkey or touchscreen button
The name suggests this is a backpack addon for MCPE (Minecraft Pocket Edition), likely created by an author named Sophisticangel.
It probably adds wearable or placeable backpacks to increase storage capacity on the go.