Useful Backpacks Mod 1.12.2/1.10.2 (Need More Inventory Storage?)
The app is not an official Minecraft product, not approved by or associated with Mojang or their respectful owner.
Useful Backpacks Mod 1.12.2/1.10.2 adds three new backpacks with small, medium and large inventory.
How to install:
Make sure you have already installed Minecraft Forge and U Team Core.
Locate the minecraft application folder.
On windows open Run from the start menu, type appdata and click Run.
On mac open finder, hold down ALT and click Go then Library in the top menu bar. Open the folder Application Support and look for Minecraft.
Place the mod you have just downloaded (.jar file) into the Mods folder.
When you launch Minecraft and click the mods button you should now see the mod is installed.