library dimension: something wrong?

I'm trying to download the library as zip or using github clone.

The zip is about 4.4GB but decompressed is more over. Can't be more precise because it full my disk, but Mechanical Parts/Chains are about 15GB

In the readme i can read a dimensione of about 1GB. What happens?

Is there a way to download only a sub-part of the library?

Start by checking the README's stated library size against the repository's downloaded and decompressed contents, especially Mechanical Parts/Chains. Determine whether the size discrepancy is expected and whether the repository documents a supported way to download only a sub-part; done should clarify the README and available download options.

Written by the indexing model from the issue text.