did it fill your C:/ drive?
My c drive have some space (about 25gb) plus the project i made for the avatar is in a different drive
It seems to be the only thing to stop it so can I deselect when importing?
I gotta be real I have no clue what could be causing your issue. Ive never had an avatar not unpackage correctly , are you using unity 2022.3.22f1 ?