Useful Backpacks Mod 1.16.5/1.15.2/1.14.4 will give you more space for inventory storage. Download the version and see which items that it will add to the game!

Features of Useful Backpacks
The project supplements three backpacks to Minecraft. They are new and diverse in size. In fact, these objects appear with small, medium, and large inventory.
It’s not too hard for you to collect materials to complete crafting recipes for Small/Medium/Large Backpacks.
Others
The author is not a developer of any older backpack mod. Textures come from the creation of Might Porky.
You can pack it in every mod pack that you like for free.
It’s feasible to report any issue!
Useful Backpacks is only a small cosmetic mod about improving your storage ability. Aside from Minecraft Forge, it also requires uteamcore. So, it’s essential for the user to download and install them before you can set up and deploy new features.
Screenshots