the process I have succeeded with:
go to the outputs of the job (4th tab) and export
find the export in its own folder in your directory within this project.
copy that file to the NEW project directory of interest.
now you can import the .csg file with “import result group” for the one that has been copied into the correct project directory.
as to low-level inputs, here’s a quick description from Ali. Use unbinned particles after classification using binned particles in cryoSPARC
there’s also a good one from oli, let me know if you can’t figure it out and I’ll dig for it.