Solarmass The instructions you gave me were to correct any defects in Nautilus. I can confirm that folders appear before files when copying or moving a file to another folder.
But this was still not the case for Nemo.
So here is what I did:
- uninstall Nemo, then restart the PC
- reinstall Nemo following the procedure provided by @EbonJaeger
- in the Preferences menu, I unchecked the "Inherit view type from parent" option
and here is the result:
Thanks again for your patience and help and good continuation... with Solus!