Overview
This mod attempts to address the issue of portable storage in a balanced, fun, and aesthetically-pleasing manner.
It adds tiered backpack of backpacks (Basic, Iron, Gold, and Diamond), each of which can be upgraded from the previous tier to give more storage room as well as more upgrade points. These upgrade points can be used to apply a number of upgrades (over 20 different ones) to the backpack to improve its functionality. Specific information can be found in the sidebar. Each backpack can be equipped, making it render on the player like in the picture above.
In addition, an extensive configuration file is included with this mod, allowing you to customize nearly every aspect of the mod if you feel as if my recipes/backpack sizes/default settings/etc. does not fit into your idea of balance.
Finally, I tried my best to make this mod efficient and thereby friendly to your computer, so performance should be a non-issue.