What is Stackpack?

I originally created the Stackpack mod back in 2013 as a convenient solution for compact storage of vanilla Minecraft blocks and items.

Packer - Portable Storage

The modern version of Stackpack operates on a similar principle, serving as a mobile storage container. When you obtain a packer, you'll find it initially set to "Configure" mode.

How to Use

To bind the packer to a specific item or block, hold the desired object in your off-hand and the packer itself in your main hand, then right-click. After this, switching between modes is done using Shift+Right-Click.

The "Pack" and "Unpack" modes are activated by simply right-clicking while holding the packer - the device will automatically perform the corresponding operation.