How to load int4.safetensors weights?

[micklexqg]

I have downloaded an entire repository of one model and there are many files under transformer folder.
What is the difference among them and I wonder how to load the int4.safetensors one as shown in the following figure if using the built-in 'from_pretrained' method.

If it is a '.pth' model as shown in the following,

then how to load it using the built-in 'from_pretrained' method or should we change with other method?